Lidé

doc. Ing. Václav Prajzler, Ph.D.

Všechny publikace

Erbium-bismuth-doped germanium silicate active optic glass for broad-band optical amplification

  • DOI: 10.1016/j.optmat.2023.113621
  • Odkaz: https://doi.org/10.1016/j.optmat.2023.113621
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This work deals with research and optimization of the optical Ge-Si glass composition doped with Er3+, Yb3+ ions and bismuth optically active centers (BACs), which are optically active for implementation in a double C- and U-band planar optical amplifier. The intention was to increase the range of amplified wavelengths in the NIR band up to 1650 nm. Various types of glass with different content of GeO2, SiO2 and Er2O3, Yb2O3 ions Bi2O3 were prepared and the luminescence response in the 1500-1700 nm range was tested. The maxima of the luminescence intensity in the optical bands and the spectral full width at half maximum (FWHM) were determined by modified reflex spectrum method measurement. The prepared Ge-Si glass doped with Er3+ ions and BACs exhibited strong and balanced emission in the 1520-1680 nm range after pumping at 1480 nm. The specific balanced differential gain of up to 0.2 dB/cm in the C-band and simultaneously 0.2 dB/cm in the U-band was measured. Our results proved that the luminescence of BACs depends on the presence of optical active Er3+ ions and germanium in matrix of glass, pumped by radiation 1480 nm and energy transfer from erbium to BACs have been newly observed in the Ge-Si glass. It has also been found that high content of germanium, comparable with silicon content is required for this transfer. The results show that the germano-silicate glass doped with Er3+ and Bi ions is a perspective material for the fabrication of broad-band amplifiers in the C- and U-bands.

Inorganic-organic hybrid polymer multimode optical channel waveguides

  • DOI: 10.1007/s00542-023-05567-x
  • Odkaz: https://doi.org/10.1007/s00542-023-05567-x
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterisation of the hybrid polymer multimode optical channel waveguides that have been used for core layers, namely OrmoClear (R) FX and OrmoCore. UV photopolymer was utilised for the cladding layers. The optical losses of the channel waveguides were measured by the cut-back method, and the lowest value for channel waveguides with the OrmoClear (R) FX core, specifically 0.22 dB/cm, was observed at 650 nm. The optical losses at 850 nm were 0.30 dB/cm and at 1310 nm, they were 0.47 dB/cm. OrmoCore channel waveguides had the lowest optical losses of 0.26 dB/cm at 850 nm, 0.32 dB/cm at 650 nm and 0.48 dB/cm at 1310 nm. The study has demonstrated that both hybrid polymers have suitable properties for the fabrication of optical waveguides for micro-opto-electro-mechanical systems and integrated optics applications for operating at 650 nm, 850 nm and 1300 nm.

Local detection of gaseous carbon dioxide using optical fibers and fiber tapers of single-cell dimensions

  • DOI: 10.1016/j.snb.2022.132887
  • Odkaz: https://doi.org/10.1016/j.snb.2022.132887
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The CO2 amount in the air and its monitoring is widely recognized as an important issue at this time. We are facing excessive CO2 production and global warming affecting not only the environment but also life at the lowest level. A variety of strategies have been designed to reduce atmospheric CO2, but one promising method is based on the application of biologically engineered microorganisms to actively consume a high volume of CO2. The paper presents the design, development, and characterization of two types of sensors for the local detection of gaseous carbon dioxide on microscopic scale. The first one was designed as a fiber optic CO2 measuring cell and the second was based on a CO2 sensitive fiber taper tip. The sensors were based on the absorption of guided visible light in a sensitive polymer layer. The sensors were characterized in the range of 0%-10.6% of carbon dioxide concentration with full linearity. A sensitivity of 0.25 +/- 0.05 dB/% and a limit of detection of 7.1.10(-3)% have been determined for the sensing element. We have experimentally verified the operational reversibility of the CO2 sensing element over time. The time response of the sensor with the finally used sensitive layer of thickness of 600 nm was one second. Both sensors were designed for future application in biological research. Especially the second type of the sensor based on 3 mu m silica glass taper tip (diameter corresponding to single-cell proportions) is suitable for laboratory testing of microorganisms and cells that actively consume gaseous carbon dioxide.

Polydimethylsiloxane multimode optical channel waveguides doped with yellow dye fabricated by microdispensing

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Latečka, M., Vařák, P., Nekvindová, P.
  • Publikace: Journal of Materials Science: Materials in Electronics. 2023, 34(27), ISSN 0957-4522.
  • Rok: 2023
  • DOI: 10.1007/s10854-023-11324-7
  • Odkaz: https://doi.org/10.1007/s10854-023-11324-7
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the properties of polydimethylsiloxane bulk samples and optical multimode channel waveguides doped with yellow dye fabricated by the microdispensing method. The spectral characteristics of the doped polymer bulk samples showed that the transmission of the edge of the spectra shifted towards longer wavelengths and significantly increased the absorption. The refractive index measured by dark mode spectroscopy did not confirm any change in the refractive index depending on the amount of the dye. The optical losses of the channel waveguides were measured by the cut-back method. The measurement showed that the waveguides with the dye-doped core containing 0.01 wt% of the dye had the lowest losses at 850 and 1300 nm, where the average losses were -1.18 dB (at 850 nm) and - 1.06 dB (at 1300 nm). In comparison with undoped samples, dye-doping caused an increase in optical losses by 0.5-1.0 dB/cm.

Power over fiber using a large core fiber and laser operating at 976 nm with 10 W power

  • DOI: 10.1016/j.yofte.2023.103404
  • Odkaz: https://doi.org/10.1016/j.yofte.2023.103404
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on the properties of a powering transmission link based on a High-Power Laser Source operating at 976 nm and large-core 105 & mu;m multimode optical fiber at a distance of 200 m. Six types of Photovoltaic Power Converters were used to convert optical power to electric power and the results are presented and discussed, as well as the properties of transport of the energy through the multimode fiber ending with an optical 1x2Y splitter.

Properties of the flexible polymer multimode optical waveguides fabricated by using the direct microdispensing method

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Chlupatý, V., Latečka, M.
  • Publikace: Proceedings of the 2023 Photonics West 2023, LASE. Washington: SPIE, 2023. p. 77-81. ISSN 0277-786X. ISBN 9781510659339.
  • Rok: 2023
  • DOI: 10.1117/12.2648061
  • Odkaz: https://doi.org/10.1117/12.2648061
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We demonstrate a simple and feasible procedure for the making of flexible multimode optical channel waveguides for light transmission in the visible and near-infrared region for biocompatible applications. The biocompatible optical elastomer with a refractive index of 1.427 was used for the core layer and the elastomer with a refractive index of 1.411 at wavelengths 654.2 nm was used for the cladding. The presented optical biocompatible silicone elastomers waveguides have appropriate properties with low optical losses. The average values of the optical losses were lower than -0.42 dB/cm at 650 nm, -0.40 dB/cm at 850 nm, -0.50 dB/cm at 1300 nm and -1.45 dB/cm at 1550 nm. This makes them suitable for realization not only in optical interconnection applications, sensors, micro-opto-electro-mechanical systems but also for optical waveguides in deep-tissue photomedicine.

Spectroscopy and lasing of cryogenically cooled Tm3+,Lu3+:CaF2 crystal

  • Autoři: Veselský, K., Šulc, J., Jelínková, H., Doroshenko, M.E., Konyushkin, V.A., Pierpoint, K.A., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Journal of Luminescence. 2023, 255 ISSN 0022-2313.
  • Rok: 2023
  • DOI: 10.1016/j.jlumin.2022.119563
  • Odkaz: https://doi.org/10.1016/j.jlumin.2022.119563
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The temperature dependence of the spectroscopic and laser properties of a new cryogenically cooled mixed fluoride Tm,Lu:CaF2 crystal was investigated. The influence of optically inactive Lu3+ ions codoping was studied. Efficient 1.9 mu m Tm3+ ions lasing at room temperature under 763 nm laser diode pumping was realized. With a temperature decrease down to 78 K the slope efficiency almost doubled up to 66% with respect to 300 K. The wide laser tuning range of 250 nm (1785-2035 nm) was demonstrated.

Circular large core optical elastomer waveguides fabricated by using direct microdispense fabrication method

  • DOI: 10.1016/j.ijleo.2021.168348
  • Odkaz: https://doi.org/10.1016/j.ijleo.2021.168348
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The direct microdispensing method used for the fabrication of the optical polymer waveguides was demonstrated. The applied method allowed fabricated optical channel waveguides with circular shapes. Optical polydimethylsiloxane elastomers used for the core and cladding layer allowed fabricated optical flexible waveguides with high temperature and chemical stability. The dimensions of the waveguides were optimized for the dimension of the optical fiber with a core diameter of 500 mu m. The applied materials allowed transmitted light for visible and near-infrared spectrums. The average values of the optical losses were lower than - 0.42 dB/cm at 650 nm, 0.40 dB/cm at 850 nm, - 0.5 dB/cm at 1300 nm and - 2.06 dB/cm at 1550 nm.

Cu/Ag Nanoparticle-Based Surface-Enhanced Raman Scattering Substrates for Label-Free Bacterial Detection

  • DOI: 10.1021/acsanm.2c02571
  • Odkaz: https://doi.org/10.1021/acsanm.2c02571
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Surface-enhanced Raman spectroscopy (SERS) is a promising analytical technique for fast and accurate disease detection due to its attractive features. However, realizing label-free direct detection is still challenging as most probes have extremely low Raman cross sections and little affinity to SERS substrates. Disappointingly, SERS spectra of most bacteria and other biological samples look similar as the differences in their molecular compositions are subtle and not detectable. Hence, the fabrication of highly enhancing plasmonic nanoparticles with excellent uniformity is demanded. Moreover, as SERS substrates are not reusable, cost-effective and simplistic fabrication methods are critical. Here, we report a facile approach to synthesizing Ag nanoparticle array on Cu-foil in less than 3 min, using only Cu-foil, silver nitrate, and hydroquinone. We employed the idea of galvanic replacement in combination with a seed mediated particle-growth approach. The label-free bacterial detection has shown that our Cu/Ag nanoparticle substrate is superior to highly acclaimed Ag nanocubes. Creating strong second and third-generation SERS hot-spots through cooperative interaction of homo-(Ag-Ag) and heterogeneous (Ag-Cu) surfaces contributes mainly to the observed excellent enhancement. Interestingly, direct liquid bacteria sample analysis showed a 6-fold higher detection sensitivity than completely dried samples. We believe that our approach will offer remarkable advantages and change how SERS substrates are prepared and conducted in SERS-based bacterial detection.

Gamma radiation effects on plastic optical fibers

  • DOI: 10.1016/j.yofte.2022.102995
  • Odkaz: https://doi.org/10.1016/j.yofte.2022.102995
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on our study of the effect of gamma-ray irradiation on Plastic Optical Fibers with a 1 mm diameter for short reach communication. For the study, we used gamma-radiation facilities with Co-60 sources for slow long-term irradiation with a low dose speed of around 70 Gy/hrs and a maximum dose up to 62.90 kGy and a higher speed irradiation dose of around 1 kGy/hrs with a maximum dose up to 51.30 kGy. The optical losses measurement showed that the losses increased linearly during the irradiation and began to decrease immediately after the end of being irradiated. Higher doses of irradiation cause a higher value of the optical loss, and at the dose of 62.9 kGy, the loss was unmeasurably high. A low dose of gamma radiation (1.24 kGy) increased optical losses only slightly and the gamma-ray irradiation at 17.6 kGy for the 20 m long fiber had optical losses of -15.5 dB at 650 nm. The results of the relaxation measurements also showed that optical losses measured at wavelength 535 nm are significantly higher than those at 650 nm. Spectral characteristics measurement done during the irradiation showed that the intensity of the transmitted light decreased and the absorption edge shifted towards the higher wavelengths. Spectral characteristics measured after irradiation during the relaxation period showed that the intensity increased and also that the absorption edge was shifted towards the lower wavelengths, but the same values as before the irradiation were not achieved.

Gamma Radiation Effects on Plastic Optical Fibers with Seven Cores

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Masopustová, K., Šaršounová, Z.
  • Publikace: POF 2022 BILBAO (SPAIN) CONFERENCE PROCEEDINGS. Bilbao: University of The Basque Country, 2022. p. 164-167.
  • Rok: 2022
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on the properties of the bundle of seven plastic optical fibers irradiated with gamma-rays. We used plastic optical fibers with cores made of polymethyl-methacrylate resin. The gamma-radiation facilities with 60Co sources for a higher speed irradiation dose of around 1 kGy/hrs with a maximum dose of up to 65.50 kGy and slow long-term irradiation with a low dose speed of around 70 Gy/hrs and a maximum dose of up to 62.90 kGy were applied.

Hybrid polymer-glass planar Bragg grating as a temperature and humidity sensor

  • DOI: 10.1007/s11082-022-04003-0
  • Odkaz: https://doi.org/10.1007/s11082-022-04003-0
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This paper presents the design and construction of a new planar optical Polymer Waveguide Bragg grating (PWBG) temperature and humidity sensor realized by polymer-glass hybrid technology composition with a new layout concept. The Bragg grating of a sensor was made by a Direct Laser Writing (DLW) in Poly (methyl methacrylate) (PMMA) formed on a multimode waveguide realized in a glass substrate by Ag+ <-> Na+ ion exchange. The fabricated hybrid Bragg grating structure exhibited more than 10 dB of the attenuation dip, equivalent to higher than 90% diffraction efficiency. The fabricated hybrid PWBG sensor exhibited high temperature and humidity sensitivity in contrast to glass-based sensors of - 48.6 pm/degrees C and 54.16 pm center dot RH-1, respectively.

Influence of Optic Cable Construction Parts on Recovery Process after Gamma Irradiation

  • Autoři: Šaršounová, Z., Plaček, V., doc. Ing. Václav Prajzler, Ph.D., Masopustová, K., Havránek, P.
  • Publikace: Energies. 2022, 15(2), ISSN 1996-1073.
  • Rok: 2022
  • DOI: 10.3390/en15020599
  • Odkaz: https://doi.org/10.3390/en15020599
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Fibre optic cables are widely used as communication cables in Instrumentation and Control (I&C) systems. In the case of nuclear power plants (NPPs), using optic cables in mild environments outside of containment areas are very common. However, at present, there is a need for fibre optic cables to be used in containment areas, i.e., with radiation. An optical fibre consists of a highly transparent core that possesses a higher refractive index than the surrounding transparent cladding, which possesses a lower refractive index. Most optical fibres are manufactured from glass (silica with required dopants) which is created at high temperatures from the reaction between gasses. The glass used in optical fibres is sensitive; it becomes dark during exposure to radiation, which compromises the optic functions. That is why there has been a slow infiltration of optic cable in NPP containment areas. Radiation resistant optic fibres have been developed. Although these fibres are called "radiation resistant," they go through a darkening process (absorbance increase) as well, but not as quickly. Immediately after the irradiation has stopped, a recovery process starts in the glass structure. During this period, optical losses of the glass improve, but not to the original level as before the irradiation. During the testing of optic cables for the installation in nuclear power plant containment areas, we observed an unusual recovery process. In the beginning, a healing effect was observed. However, after a few days of recovery, the healing process stopped, and the trend changed again as a worsening of the optical properties was observed. This paper describes experiments which explain the reasons for such an unexpected behaviour.

Multimode Optical Polymer Waveguides Fabricated by R2P Nanoimprinting for Optical Interconnection

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on polymer optical waveguides fabricated by roll-to-plate technology (R2P) nanoimprinting. Our measurement proved that the presented waveguides will allow the realization of optical waveguides with low optical losses at the key optical communication wavelengths at 850 and 1300 nm. We also show low optical losses of these waveguides in the visible spectrum at 530 nm (green light) and 650 nm (red light). The paper has also demonstrated that the R2P fabrication procedure allows the easy fabrication of optical waveguide devices and has great potential for the implementation of optical polymer waveguides for optical interconnection applications.

Properties of Photovoltaic Power Converters for Power over Fiber Applications

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on the optical properties of the Si vertical multi-junction cell photovoltaic converters optimized for 980 nm wavelengths for power over fiber applications. The converters were coupled with the 105 μm multimode fiber and the optical efficiency were measured for optical power from 250 mW to 4 W.

The effect of gamma-ray irradiation on polycarbonate sheets

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Chlupatý, V., Šaršounová, Z.
  • Publikace: Radiation Physics and Chemistry. 2022, 196(Article Number 110100), ISSN 0969-806X.
  • Rok: 2022
  • DOI: 10.1016/j.radphyschem.2022.110100
  • Odkaz: https://doi.org/10.1016/j.radphyschem.2022.110100
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In our study, we report on the effect of gamma-ray irradiation on four types of polycarbonate sheets. We used the panoramic gamma-radiation facility with Co-60 source with applied doses from 1.38 to 100.50 kGy with the radiation dose rate 66.6 +/- 6.3 Gy/h. To get knowledge on the needed properties, the prism coupling method was used for refractive indices measurement at six wavelengths (532.0, 654.2, 846.4,1308.2, 1549.1 and 1652.1 nm) and Sellmeier approximation with an infrared correction was used to estimate the refractive indices from 500 to 1700 nm. The transmission spectra were measured in the spectral range from 250 to 2150 nm and absorption coefficient and band gap Eg were calculated from transmission spectra. The chromaticity coordinates and influence of the gamma-irradiation were also studied. Our results proved that materials such as these can be used in gamma-radiation-exposed environments for optical components such as digital camera lenses, optical lenses, mirrors, prisms, optical waveguides, etc.

All-Polymer Silk-Fibroin Optical Planar Waveguides

  • DOI: 10.1016/j.optmat.2021.110932
  • Odkaz: https://doi.org/10.1016/j.optmat.2021.110932
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This paper presents the properties of optical planar waveguides made of silk fibroin, extracted from Bombyx mori cocoons deposited on an allyl diglycol carbonate substrate. Raman spectroscopy and Fourier-transform infrared spectroscopy were used to characterise the molecular structures of the silk fibroin layer, while the waveguiding properties were measured by the m-line spectroscopy at six wavelengths 532.0, 654.2, 846.4, 1308.2, 1549.1 and 1652.1 nm. The measurement proved that the silk fibroin layer guide light at all measured wavelengths. Optical losses were measured by scanning a fibre-optic probe at 846.4 and 1549.1 nm; they were estimated to be 0.24 dB cm−1 and 0.25 dB cm−1, respectively. Our results have proved that the Bombyx mori silk fibroin has great potential in new bio-photonic devices.

Er3+/Yb3+ doped active optic Y splitter realized by diffusion waveguides with Ag+-Na+ ion exchange

  • DOI: 10.1007/s11082-021-03035-2
  • Odkaz: https://doi.org/10.1007/s11082-021-03035-2
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We reported on the active channel waveguides, formed in novel types of silicate glasses, doped with rare-earth elements, and Zn were investigated. The silicate glass GZ4 with Er3+ and Yb3+ content was studied, and the best doping ratio was estimated about luminescent properties. The composition of the glass samples (GZ4) with the content of 0.25 mol.% Er2O3 and 5.0 mol.% Yb2O3 and 12.0 mol.% resp. 18.0 mol.% ZnO was optimized. This glass was evaluated as the most suitable material for integrated amplifiers in the 1 530-1 565 nm telecommunication band. Other samples were prepared with active channel waveguides and active planar optical power splitter Y with a splitting ratio of 1x2 by two-step ion-exchange Na+<-> Ag+. Diffusion profiles of the created samples were analyzed by the EMA microscope and compared with the near mode-field distribution measurement results. Afterward, the amplification properties of the designed structures were studied, and the differential gain from 1.2 to 1.6 dB (0.48 to 0.64 dB/cm) was achieved by pumping power 200 mW at 980 nm.

Influence of Y2O3 Content on Structural, Optical, Spectroscopic, and Laser Properties of Er3+, Yb3+ Co-Doped Phosphate Glasses

  • Autoři: Veselský, K., Lahti, V., Petit, L., doc. Ing. Václav Prajzler, Ph.D., Šulc, J., Jelínková, H.
  • Publikace: Materials. 2021, 14(14), ISSN 1996-1944.
  • Rok: 2021
  • DOI: 10.3390/ma14144041
  • Odkaz: https://doi.org/10.3390/ma14144041
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The influence of the addition of Y2O3 on the structural, spectroscopic, and laser properties of newly prepared Er, Yb-doped strontium-sodium phosphate glass was investigated. While the addition of Y2O3 has a small influence on the absorption spectra and fluorescence lifetime, it has a strong impact on the emission cross-section and on OH- content. The glasses were used as the active medium for diode-pumped laser emitting at 1556 nm. The increase in Y2O3 content leads to a significant 35% increase in laser slope efficiency up to 10.4%, but at the expense of the substantial reduction of the wavelength tunability from 82 to 54 nm.

Large core optical elastomer splitter fabricated by using 3D printing pattern

  • DOI: 10.1007/s11082-021-02980-2
  • Odkaz: https://doi.org/10.1007/s11082-021-02980-2
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The design, fabrication and properties of the large core 1 × 2Y optical planar splitter using optical elastomers for its cladding and core is demonstrated. The splitters were designed by using the beam propagation method, optimized for the operation wavelength of 650 nm. The splitters were fabricated using an epoxy polymer pattern, fabricated by Stereolithography 3D printing technology. The dimensions of the splitters were optimized for assembling an optical fiber with a core diameter of 500 µm. The splitter shows optical losses around 1.48 dB at 650 nm, 1.18 dB at 850 nm, 1.82 dB at 1300 nm and 2.12 dB at 1550 nm.

Optical Polymer Waveguides Fabricated by Roll-to-Plate Nanoimprinting Technique

  • DOI: 10.3390/nano11030724
  • Odkaz: https://doi.org/10.3390/nano11030724
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the properties of UV-curable inorganic-organic hybrid polymer multimode optical channel waveguides fabricated by roll-to-plate (R2P) nanoimprinting. We measured transmission spectra, refractive indices of the applied polymer materials, and optimized the R2P fabrication process. Optical losses of the waveguides were measured by the cut-back method at wavelengths of 532, 650, 850, 1310, and 1550 nm. The lowest optical losses were measured at 850 nm and the lowest average value was 0.19 dB/cm, and optical losses at 1310 nm were 0.42 dB/cm and 0.25 dB/cm at 650 nm respectively. The study has demonstrated that nanoimprinting has great potential for the implementation of optical polymer waveguides not only for optical interconnection applications.

Silk fibroin optical planar waveguides fabricated on acrylic polymer foil

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Kyungtaek, M., Sunghwan, K., Nekvindova, P.
  • Publikace: TECHNICAL DIGEST OF THE TWENTY-SIXTH MICROOPTICS CONFERENCE. Yokohama: Microoptics Group, JSAP, 2021. p. 152-153. vol. 1. ISBN 978-4-86348-775-8.
  • Rok: 2021
  • DOI: 10.23919/MOC52031.2021.9598124
  • Odkaz: https://doi.org/10.23919/MOC52031.2021.9598124
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about the optical properties of the silk fibroin layers fabricated onto the polymer foils and allyl diglycol carbonate plastic substrate. Waveguiding properties were measured by m-line spectroscopy and optical losses by the fibre scanning method. The optical losses were lower than 0.30 dB/cm at 846.4 and 1549.1 nm.

Tm:GGAG disordered garnet crystal for 2 µm diode-pumped solid-state laser

  • Autoři: Kratochvíl, J., Boháček, P., Šulc, J., Němec, M., Jelínková, H., Fibrich, M., Trunda, B., Havlák, L., Jurek, K., Nikl, M., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Laser Physics Letters. 2021, 18(11), ISSN 1612-202X.
  • Rok: 2021
  • DOI: 10.1088/1612-202X/ac2519
  • Odkaz: https://doi.org/10.1088/1612-202X/ac2519
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Lasing parameters and wavelength tunability of a new disordered solid-state active medium, Tm3+-doped gadolinium gallium aluminum garnet (Tm3+-doped Gd3(Ga1-xAlx)5O12, Tm:GGAG), were investigated. Five samples with thulium concentration ranging from 1.4 at.% to 9.2 at.% (Tm/Gd) were designed, grown, and investigated. Basic spectroscopic characterization and measurement of a refractive index were performed. Each sample was tested as an active medium of a 2 µm laser, longitudinally diode-pumped at 786 nm. Tm3+ concentration dependence of laser parameters was investigated. The highest slope efficiency of 43% w.r.t. absorbed power in the pulsed regime and 35% in the CW regime was achieved with the 2.4 at.% (Tm/Gd) sample. All samples produced beams of good quality with an estimated M$^2 \leqslant 1.6$. Concentration-dependent tunability was investigated and a smooth continuous range of wavelengths, up to 187 nm wide, was recorded.

Effects of gamma rays on elastomer multimode optical channel waveguides

  • DOI: 10.1007/s10854-020-04274-x
  • Odkaz: https://doi.org/10.1007/s10854-020-04274-x
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on properties of the elastomer multimode optical channel waveguides. The waveguides were fabricated by the doctor blade technique using the nickel mold with the dimension of the core 50 x 50 mu m(2)and irradiated by gamma rays from 60Co source with the dose rate 1 kGy/h. The applied irradiations were 14.6 kGy and 33.9 kGy and we studied the influence of gamma rays on the properties of the elastomer waveguides. We measured transmission spectra, refractive indices and the waveguide propagation losses. The lowest values of the optical losses were 0.21 dB/cm at 1310 nm and 0.35 dB/cm at 850 nm in the samples irradiated with dose 14.6 kGy and 0.55 dB/cm at 1310 nm and 0.66 dB/cm at 850 nm for the sample irradiated with a higher dose 33.9 kGy. The average value of the optical losses at 650 nm was 0.78 dB/cm (dose 14.6 kGy) and 1.05 dB/cm (dose 33.9 kGy). Optical silicone elastomers have unique properties and can be used for the realization of the optical waveguides for interconnection or realization photonics structures for applications in extreme environments.

Epoxy polymer optical waveguide for micro-opto-electro-mechanical systems

  • DOI: 10.1007/s00542-020-04921-7
  • Odkaz: https://doi.org/10.1007/s00542-020-04921-7
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterisation of E3135 epoxy polymer planar waveguides fabricated onto allyl diglycol carbonate substrate. We measured transmission spectra from the visible to near-infrared region and studied waveguiding properties by the m-line spectroscopy using six lasers (532.0, 654.2, 846.4, 1308.2, 1549.1 and 1652.1 nm). Optical scattering losses of the planar waveguides were measured by the fibre scanning method. The lowest values of the optical losses were 0.33 dB/cm at 632.8 nm and 0.35 dB/cm at 850 nm. Our research showed that the epoxy polymer E3135 is a promising material for the implementation into the MOEMS structures with higher integration density, thus it allows for realisation low-cost and feasibly elaborated MOEMS components.

Optical properties of deoxyribonucleic acid thin layers deposited on an elastomer substrate

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Jung, W., Oh, K., Cajzl, J., Nekvindová, P.
  • Publikace: Optical Materials Express. 2020, 10(2), 421-433. ISSN 2159-3930.
  • Rok: 2020
  • DOI: 10.1364/OME.10.000421
  • Odkaz: https://doi.org/10.1364/OME.10.000421
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper presents our research on the optical properties of thin-film deoxyribonucleic acid (DNA) complexes based on cetyltrimethylammonium (DNA-CTMA) deposited onto an optical elastomer substrate, which may be suitable for the construction of biophotonic devices. The study involved the measurement of Raman spectra, absorption spectra from the visible to the near-infrared region and the values of the refractive indices by m-line spectroscopy at five wavelengths (473, 632.8, 964, 1311, and 1552 nm). The samples were proved to have waveguiding properties from visible to infrared spectrum and high contrast of refractive index - the value is 0,0457. Photoluminescence measurement was done under excitation at three wavelengths (355, 405 and 450 nm) and showed one broadband with maxima at 437, 520 and 530 nm depending on the excitation wavelengths. The study has demonstrated that this combination of polymers, because of its unique properties, has great potential for the implementation of all-polymer structures in the applications of high-density photonics and biocompatible optical devices.

Polymer Multimode Optical Waveguides for Optical Interconnection in Harsh Environment

  • DOI: 10.1109/OECC48412.2020.9273570
  • Odkaz: https://doi.org/10.1109/OECC48412.2020.9273570
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We present the properties of the optical elastomer multimode waveguides influenced by gamma radiation. The 60Co source with a dose of 14.6 kGy was used and the lowest optical losses were found 0.25 dB/cm at 1310 nm.

The effect of gamma-ray irradiation on bulk optical plastic materials

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Chlupatý, V., Šaršounová, Z.
  • Publikace: Journal of Materials Science: Materials in Electronics. 2020, 31(24), 22599-22615. ISSN 0957-4522.
  • Rok: 2020
  • DOI: 10.1007/s10854-020-04772-y
  • Odkaz: https://doi.org/10.1007/s10854-020-04772-y
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We present our study of the effect of gamma-ray irradiation on bulk optical plastic materials as follows: three types of sheets commonly used for eyeglass lenses (CR-39, MR-8 and Trivex), cyclo olefin polymer ZEONEX E48R, styrene methyl methacrylate NAS21, polymethyl methacrylate PLEXIGLAS (R) 7N, polyphenylsulfone EUROPLEX (R) PPSU, and poly(n-methyl methacrylimide PLEXIMID (R) 8813. We used the panoramic gamma-radiation facility with Co-60 source with applied doses 14.6 kGy and 54.2 kGy. For the thought properties, we measured the transmission spectra from 200 to 1800 nm and refractive indices using the prism coupling technique at six wavelengths 532.0, 654.2, 846.4, 1308.2, 1549.1, and 1652.1 nm. We also studied the possibility of using several approximation methods for evaluating the refractive indices including Cauchy, Cauchy-Schott, Herzberger, Sellmeier, Sellmeier-2, and Sellmeier with an infrared correction. The measurements showed that the most precise determination model of the refractive indices was obtained by the Sellmeier approximation with an infrared correction. The transmission spectra measurement showed that the CR-39 and EUROPLEX (R) PPSU polymers did not change significantly after the irradiation and the refractive indices measurement showed that ZEONEX E48R and EUROPLEX (R) PPSU did not change the refractive indices values.

Cyclo Olefin Copolymer Large Core Optical Splitter

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Zázvorka, J.
  • Publikace: 24th Optoelectronics and Communications Conference. Piscataway: IEEE Photonics Society, 2019. ISBN 978-4-88552-321-2.
  • Rok: 2019
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of the large core optical splitter made core from optically clear photopolymer and Cyclo Olefin Copolymer cladding. The splitter allowed a higher operating temperatures than standard splitters made of acrylate plastic.

Flexible multimode optical elastomer waveguides

  • DOI: 10.1007/s10854-019-02087-1
  • Odkaz: https://doi.org/10.1007/s10854-019-02087-1
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on properties of the new optical elastomer used for the realization of the multimode channel waveguides. The waveguides were fabricated by the doctor blade technique using the nickel mould with the dimension of the core 50 × 50 µm2. We measured refractive indices and waveguiding properties of the applied materials by dark mode spectros-copy and the waveguide propagation losses of the channel waveguides were measured using the cut-back method at the wavelengths from visible to infrared region. The optical losses in the infrared spectrum were lower than 0.60 dB/cm and in visible spectrum 0.76 dB/cm at 650 nm.

Inorganic-organic hybrid polymer optical planar waveguides for micro-opto-electro-mechanical systems (MOEMS)

  • DOI: 10.1007/s00542-018-4105-x
  • Odkaz: https://doi.org/10.1007/s00542-018-4105-x
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterisation of three types of OrmoClear, OrmoClear((R))HI01 XP and OrmoClear((R))FX hybrid polymer optical planar waveguides deposited on glass substrate. The design of the optical planar waveguides was done using a modified dispersion equation; waveguiding properties and refractive indices were measured by dark mode spectroscopy at five wavelengths: 473, 632.8, 964, 1311 and 1552nm; the measurement showed that the OrmoClear HI01 XP had a higher refractive index value (1.582 at 1552nm) than the OrmoClear polymer (1.537 at 1552nm). Optical scattering losses of the waveguides were measured by the fibre scanning method; the measurement showed that the average values of the optical losses of the OrmoClear HI01 XP (0.48dB/cm) were lower than those of the OrmoClear FX (0.64dB/cm) and the OrmoClear polymer (0.76dB/cm) for the measured wavelengths 964, 1311 and 1552nm. Our measurement showed that the OrmoClear HI01 XP would allow the implementation of the MOEMS structures with higher integration density also in the case of such commonly used substrates as e.g. silica-on-silicon and that our approach would make possible to use low-cost and feasibly elaborated hybrid-polymer-based structures instead of the widely used semiconductor approach.

Polymer large core optical splitter 1x2 Y for high-temperature operation

  • DOI: 10.1007/s11082-019-1933-6
  • Odkaz: https://doi.org/10.1007/s11082-019-1933-6
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The design, fabrication and measurement of the properties of the large core 1x2 Y optical planar splitters for high-temperature operation are demonstrated. The splitters were designed by the beam propagation method optimized for operation wavelengths 650nm and for assembling with optical fibre having core diameter 600 mu m and cladding 630 mu m. The splitters consisted of optical glue core and cladding layers made of Cyclo Olefin Polymer. The applied materials allowed for higher operating temperatures (up to 120 degrees C) than standard splitters made of acrylate plastic (up to 80 degrees C). The splitters show optical losses lower than 4.0dB at 532nm/650nm, 2.6dB at 850nm, 3.4dB at 1300nm and 5.1dB at 1550nm at room temperature. The optical losses measured in the thermal shock test chamber at temperatures up to 120 degrees C showed that the best sample had losses lower than 4.2dB at 850/1300nm, 4.6dB at 532nm and 7.6dB at 650nm. Such splitters would be very useful in places with elevated temperatures, for instance in engine parts where the expected temperature can reach as high as 120 degrees C.

Properties of Large Core Polymer Optical Bend Waveguides

  • DOI: 10.13164/re.2019.0001
  • Odkaz: https://doi.org/10.13164/re.2019.0001
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of large core plastic planar optical bend waveguides. The dimensions of the waveguides were to be compatible with the commonly used plastic optical fiber with diameter 750 mu m and the bend radii of the waveguides varied from 30 to 1 mm. The waveguides were made by engraving of a U-groove by using CNC machining into poly(methyl methacrylate) substrate; the waveguide core layers were made of Norland Optical Adhesive UV photopolymer. We experimentally confirmed that fabricated bends may have the total bend losses A for radii 30 mm 4.1 dB/cm at 850 nm, 4.8 dB/cm at 650 nm and 5.63 dB/cm at 532 nm. These bend waveguides are viable for short reach visible and infrared optical communication with easy and low cost installations.

Simulation and fabrication of 3D printed optical planar multimode 1x2Y splitters

  • Autoři: Hybler, J., doc. Ing. Václav Prajzler, Ph.D., Dlouhý, J.
  • Publikace: Proceedings of Adept. Žilina: EDIS - Publishing Institution of the University of Zilina, 2019. p. 159-162. ISBN 978-80-554-1568-0.
  • Rok: 2019
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This paper reports about design and simulation of planar optical multimodal splitters in combination with plastic optical fibers for the visible spectrum. These devices consisted of Veroclear RGD810 core and Polydimethylsiloxane PDMS substrate/cladding. The splitters were simulated by the beam propagation method using RSoft software and by using a ray tracing method used OptiCAD software. The simulations were done for the width of waveguide core 750 µm. The core was manufactured by 3D printer Stratasys Objet 30 Pro. Estimation of total excess loss was discussed using waveguide loss theory. Material constants were measured. Both - extrinsic and intrinsic factors were defined and used for this estimation. And the final model is presented. The values of optical insertion loss were simulated at 650 nm and compared to values measured.

The properties of free-standing epoxy polymer multi-mode optical waveguides

  • DOI: 10.1007/s00542-018-3960-9
  • Odkaz: https://doi.org/10.1007/s00542-018-3960-9
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterisation of free-standing multimode optical epoxy polymer waveguides consisting of a core made of EpoCore and EpoClad polymer cladding and cover protection layers. The 50 × 50 μm2 rectangular waveguides are intended for short-reach optical interconnection and optimised for an operating wavelength of 850 nm. The waveguides of the proposed shapes were fabricated by a standard photolithography process on a silicon substrate provided with a Poly(vinyl alcohol) thin layer. The free-standing structure was then achieved by peeling the deposited EpoClad/EpoCore/EpoClad structures of that substrate. The optical scattering losses of the created planar waveguides, measured by the fibre probe technique at 632.8 and 964 nm, were 0.30 dB cm−1 at 632.8 nm and 0.17 dB cm−1 at 964 nm. Propagation optical loss measurements for rectangular waveguides were performed by the cut-back method and the best samples had optical losses below 0.55 dB cm−1 at 850 and 1310 nm.

Erbium Luminescence Centres in Single- and Nano-Crystalline Diamond-Effects of Ion Implantation Fluence and Thermal Annealing

  • Autoři: Cajzl, J., Nekvindova, P., Mackova, A., Malinsky, P., Oswald, J., Remes, R., Varga, M., Kromka, A., Akhetova, B., Boettger, R., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Micromachines. 2018, 9(7), 1-14. ISSN 2072-666X.
  • Rok: 2018
  • DOI: 10.3390/mi9070316
  • Odkaz: https://doi.org/10.3390/mi9070316
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We present a fundamental study of the erbium luminescence centres in single- and nano-crystalline (NCD) diamonds. Both diamond forms were doped with Er using ion implantation with the energy of 190 keV at fluences up to 5 x 10(15) ions.cm(-2), followed by annealing at controllable temperature in Ar atmosphere or vacuum to enhance the near infrared photoluminescence. The Rutherford Backscattering Spectrometry showed that Er concentration maximum determined for NCD films is slightly shifted to the depth with respect to the Stopping and Range of Ions in Matter simulation. The number of the displaced atoms per depth slightly increased with the fluence, but in fact the maximum reached the fully disordered target even in the lowest ion fluence used. The post-implantation annealing at 800 degrees C in vacuum had a further beneficial effect on erbium luminescence intensity at around 1.5 mu m, especially for the Er-doped NCD films, which contain a higher amount of grain boundaries than single-crystalline diamond.

Flexible multimode polydimethyl-diphenylsiloxane optical planar waveguides

  • DOI: 10.1007/s10854-018-8560-z
  • Odkaz: https://doi.org/10.1007/s10854-018-8560-z
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterization of flexible optical multimode silicon-based organic elastomer planar and rectangular waveguides, where polydimethyl-diphenylsiloxane (PDMDPS) was used for the waveguide core and polydimethylsiloxane was used for the cladding and cover protection layers. We measured waveguiding properties of PDMDPS planar waveguides deposited on glass substrate using the prism coupling technique and the optical scattering losses of the waveguides by the fiber probe technique at the wavelengths region from visible to infrared. The design of the rectangular waveguides was planned for the geometric dimensions of the core 50 x 50 A mu m(2) and the proposed shapes were realized by the doctor blade technique into a nickel mold. Insertion optical loss measurement of rectangular waveguides was done by the cut-back method and the best samples had optical losses lower than 0.35 dB cm(-1) at 532, 650, 850 and 1310 nm. The main virtue of the waveguides is their flexibility, suitable in particular for optical connections in a wide range of the wavelengths.

Polydimethyl-diphenylsiloxane Free-Standing Flexible Optical Planar Waveguides for Optical Interconnection

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of the optical free-standing flexible multimode Polydimethyl-diphenylsiloxane waveguides for optical interconnection applications. Optical losses of the waveguides were lower than 0.35 dB/cm from visible to near infrared spectrum.

Simulation and manufacturing of 3D printed optical planar multimode 1x2Y splitters

  • Autoři: Hybler, J., doc. Ing. Václav Prajzler, Ph.D., Knietel, M.
  • Publikace: 29th Conference and Exhibition on OPTICAL COMMUNICATIONS 2018. Praha: Zeithamlová Milena Ing. - Agentura Action M, 2018. ISBN 978-80-86742-50-2.
  • Rok: 2018
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Paper reports about design and simulation of planar optical splitters assembled with plastic optical fibers. These devices consisted of Veroclear RGD810 or Polydimethylsiloxane PDMS substrate/cladding and Norland Optical Adhesive NOA73 or Veroclear RGD810 core polymer. The splitters were simulated by Beam Propagation Method using RSoft software and by using ray tracing method used OptiCAD software. The simulations were done for width of waveguide core 750 µm and wavelength 650 nm and the lowest values of optical insertion loss simulated were 1.5dB.

The Investigation of the Waveguiding Properties of Silk Fibroin from the Visible to Near-Infrared Spectrum

  • DOI: 10.3390/ma11010112
  • Odkaz: https://doi.org/10.3390/ma11010112
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Silk fibroin protein has been reinvented as a new optical material for biophotonic applications because of its optical transparency, biocompatibility, and easy fabrication process. It is used in various silk-based optical devices, which makes it desirable to investigate the optical properties of silk from diverse perspectives. This paper presents our investigation of the optical properties of silk fibroin, extracted from Bombyx mori cocoons. We have measured transmission spectra from the visible to near-infrared region and investigated waveguiding properties by the prism-coupling technique for five wavelengths (473.0, 632.8, 964.0, 1311, and 1552 nm). From the measurements, we determined the values of refractive indices. The measurements also proved waveguiding properties for all of the wavelengths. Optical scattering losses were measured by the fiber probe technique at 632.8 nm and were estimated to be 0.22 dB.cm(-1).

Filter Embedded Optical Planar Splitter Connectable to Large Core Plastic Optical Fibers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Maštera, R., Knietel, M.
  • Publikace: 2017 CLEO Pacific Rim Conference. OSA Publishing, 2017. p. 1-2. ISSN 2166-8892. ISBN 978-1-5090-6293-5.
  • Rok: 2017
  • DOI: 10.1109/OECC.2017.8114761
  • Odkaz: https://doi.org/10.1109/OECC.2017.8114761
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about the design, fabrication and properties of wavelength division multiplex module with large core multimode optical polymer waveguides. The module is assembled from multimode planar optical 1x2Y splitter embedded with multilayered dielectric filters and connected with large core plastic fibers. The splitter was designed by beam propagation method using BeamPROP software for connecting input and outputs large core standard plastic optical fiber with 1 mm core diameter. Optically clear UV photopolymer was used as core optical waveguide layer and poly(methyl methacrylate) were used as substrate and protection cover. Thin film filters, plastic filters and foil filters were applied for wavelength division multiplexing at 532/650 nm.

Large core plastic planar optical splitter fabricated by 3D printing technology

  • DOI: 10.1016/j.optcom.2017.04.070
  • Odkaz: https://doi.org/10.1016/j.optcom.2017.04.070
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report on the design, fabrication and optical properties of large core multimode optical polymer splitter fabricated using fill up core polymer in substrate that was made by 3D printing technology. The splitter was designed by the beam propagation method intended for assembling large core waveguide fibers with 735 μmμm diameter. Waveguide core layers were made of optically clear liquid adhesive, and Veroclear polymer was used as substrate and cover layers. Measurement of optical losses proved that the insertion optical loss was lower than 6.8 dB in the visible spectrum.

Properties of Multimode Optical Epoxy Polymer Waveguides Deposited on Silicon and TOPAS Substrate

  • DOI: 10.13164/re.2017.0010
  • Odkaz: https://doi.org/10.13164/re.2017.0010
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the fabrication and characterization of multimode polymer optical waveguides. Epoxy polymer EpoCore was used as the waveguide core material and EpoClad was used as a cladding and cover protection layer. The design of the waveguides was schemed for geometric dimensions of 50 mu m core and for 850 nm and 1310 nm wavelengths. Proposed shapes of the waveguides were fabricated by standard photolithography process. Optical losses of the planar waveguides were measured by the fibre probe technique at 632.8 nm and 964 nm. Propagation optical loss measurements for rectangular waveguides were done by using the cut-back method and the best samples had optical losses lower than 0.53 dB/cm at 650 nm, 850 nm and 1310 nm.

The evaluation of the refractive indices of bulk and thick polydimethylsiloxane and polydimethyl-diphenylsiloxane elastomers by the prism coupling technique

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Nekvindová, P., Špirková, J., Novotný, M.
  • Publikace: Journal of Materials Science: Materials in Electronics. 2017, 28(11), 7951-7961. ISSN 0957-4522.
  • Rok: 2017
  • DOI: 10.1007/s10854-017-6498-1
  • Odkaz: https://doi.org/10.1007/s10854-017-6498-1
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This paper presents the study of the optical properties of bulk and thin-film samples made from polydimethylsiloxane and polydimethyl-diphenylsiloxane elas- tomers. The chemical structures of the prepared elastomer samples were characterised by infrared spectroscopy. Also their transmission spectra were measured in the visible and infrared regions. The refractive indices of the samples were measured by the prism coupling technique using dark mode spectroscopy for five wavelengths (473, 632.8, 964, 1311 and 1552  nm). Particular focus was placed on the effect of the dependence of refractive index on the conditions of deposition. It has been found that the changes of refractive indices can be achieved by the modification of deposition conditions (hardening temperature and/or A:B mixed agent ratios). In order to obtain more significant changes of the refractive indices, we recommend using polydimethyldiphenylsiloxane elastomer as a waveguide layer because of it content of phenyl groups, which lead to an increase in the value of the refractive index.

Wavelength division multiplexing module with large core optical polymer planar splitter and multilayered dielectric filters

  • DOI: 10.1007/s11082-017-0960-4
  • Odkaz: https://doi.org/10.1007/s11082-017-0960-4
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on the design, fabrication and characterization of low cost and simple fabrication method of the planar wavelength division multiplexing modules with large core input/outputs multimode optical polymer waveguides. The modules are consisting on optical 1x2Y splitter assembled with multilayered dielectric filters and large core plastic fibers. The splitters were designed by beam propagation method using BeamPROP software for input/outputs polymer fibers with 1 mm diameter. Acrylic-based polymers were used as core optical waveguides and poly(methyl methacrylate) were used as substrate and protection cover. Multilayered dielectric filters for wavelengths 532 and 650 nm were used for wavelength division multiplexing. Measurement of the optical insertion losses proved that the insertion optical loss could be lower than 8.1 dB at 650 nm and 8.7 dB at 532 nm. The best module had insertion losses 6.8 dB at 650 nm and 6.9 dB at 532 nm. The wavelength division multiplexing modules can be applied for new application in low cost short distances optical networks.

Ion-implantation of erbium to the nanocrystalline diamond thin films

  • Autoři: Nekvindova, P., Babchenko, 0., Cajzl, J., Kromka, A., Mackova, A., Malinsky, P., doc. Ing. Václav Prajzler, Ph.D., Remes, Z., Varga, M., Oswald, J.
  • Publikace: Journal of Optoelectronics and Advanced Materials. 2016, 18(7-8), 679-684. ISSN 1454-4164.
  • Rok: 2016
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    High-refractive-index nanocrystalline diamond films deposited on borosilicate glass from a CH4/CO2/H-2 gas mixture by a linear-antenna microwave plasma-enhanced chemical vapour deposition (MW PECVD) were doped by erbium using ion implantation technique. The prepared thin films guided an optical signal in the range of 632-1552 nm and revealed measurable luminescence around 1530 nm. The changes of optical properties and surface morphology were studied more in detail.

Large core optical planar splitter for visible and infrared region

  • DOI: 10.1007/s11082-016-0444-y
  • Odkaz: https://doi.org/10.1007/s11082-016-0444-y
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and optical properties of large core multimode optical polymer splitter for visible and infrared spectral region. The splitters were designed by beam propagation method for large core waveguides with 1 mm diameter fibers. UV acrylate photopolymer was used as waveguide core layers and poly(methyl methacrylate) was used for substrate and cover layer, respectively. The splitter had insertion loss 5.8 dB for 532 nm and 6.3 dB for 650 nm in visible region and 6.1 dB for 1310 nm and 6.2 dB for 1550 nm in infrared region, respectively. The splitters as this one may find their application in low cost short distances optical networks in a wide range of the spectrum.

Multimode Three Branch Polymer Splitter

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Maštera, R.
  • Publikace: 21st Optoelectronics and Communications Conference (OECC2016) / Photonics in Switching 2016 (PS2016). Tokyo: The Institute of Electronics, Information and Communication Engineers, 2016. ISBN 978-4-88552-305-2.
  • Rok: 2016
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about three branch multimode polymer power splitters. New design with insertion of rectangle shaped spacing into the central part of the splitter ensures more evenly distribution of the output optical power.

Preparation and optical properties of nanocrystalline diamond coatings for infrared planar waveguides

  • Autoři: Remes, Z., O., Babchenko, Varga, M., Stuchlik, J., Jirasek, V., doc. Ing. Václav Prajzler, Ph.D., Nekvindova, P., Kromka, A.
  • Publikace: Thin Solid Films. 2016, 618(Part A), 130-133. ISSN 0040-6090.
  • Rok: 2016
  • DOI: 10.1016/j.tsf.2016.04.026
  • Odkaz: https://doi.org/10.1016/j.tsf.2016.04.026
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The intrinsic hydrogenated amorphous silicon (a-Si:H) near infrared planar waveguides were grown on glass substrates from silane/hydrogen mixture at the substrate temperature about 250°C. Nanocrystalline diamond (NCD) coatings with reduced surface roughness were grown on a-Si:H by the microwave plasma enhanced chemical vapor deposition from hydrogen rich plasma with adding methane and carbon dioxide at temperature as low as 210°C. The optical absorptance spectra, Raman spectra and scanning electron microscopy (SEM) reveal the diamond character of the coatings as well as the stability of a-Si:H layer during diamond deposition. The critical issue for applying NCD/a-Si:H structures as optical waveguides is the optical absorption in NCD coatings. The COMSOL Multiphysics FEM simulations show that the near infrared optical absorptance in NCD coating must be reduced below 10/cm to reduce the optical attenuation in NCD/a-Si:H waveguide below 1 dB/cm.

Prism coupling technique for characterization of the high refractive index planar waveguides

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Nekvindová, P., Varga, M., Bruncko, J., Remes, Z., Kromka, A.
  • Publikace: Journal of Optoelectronics and Advanced Materials. 2016, 18(11-12), 915-921. ISSN 1454-4164.
  • Rok: 2016
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We present the study of properties of semiconductor optical planar waveguides fabricated from materials with high refractive index. The nanocrystalline diamond and nanocrystalline zinc oxide planar waveguides have been deposited by microwave plasma enhanced chemical vapour deposition and by pulse laser deposition on glass substrates. Monocrystalline gallium nitride planar waveguides were prepared by metalorganic chemical vapour deposition on sapphire substrates. The morphology of prepared layers was characterized using scanning electron microscopy, Raman spectroscopy and X-ray diffraction. Waveguiding properties and the refractive indices of prepared thin films were determined by prism coupling technique and our measurement shows that our samples had waveguiding properties for all measured wavelengths from ultraviolet to infrared spectral range.

Properties of Siloxane Based Optical Waveguides Deposited on Transparent Paper and Foil

  • DOI: 10.13164/re.2016.0230
  • Odkaz: https://doi.org/10.13164/re.2016.0230
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper, we present the properties of flexible planar optical waveguides made of siloxane-based polymer deposited on Xerox transparent paper and PLEXIGLAS foil substrate. Measurement of optical properties such as the waveguiding properties and refractive index is carried out by the prism coupling technique for five wavelengths (473, 632.8, 964, 1311 and 1552 nm) and propagation optical loss were measured by the fibre probe technique at a wavelength of 632.8 nm (He-Ne laser). The measurement proved waveguiding properties for all measured wavelengths and the losses generally did not exceed 0.40 dB/cm; the best samples had optical losses around 0.24 dB/cm.

THE INTRINSIC SUBMICRON ZNO THIN FILMS PREPARED BY REACTIVE MAGNETRON SPUTTERING

  • Autoři: Remeš, Z., Stuchlik, J., Purkrt, A., Chang, Y., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: 8TH INTERNATIONAL CONFERENCE ON NANOMATERIALS - RESEARCH & APPLICATION (NANOCON 2016). Ostrava: Tanger, 2016. p. 36-41. ISBN 978-80-87294-71-0.
  • Rok: 2016
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The DC reactive magnetron sputtering of metallic target in oxide atmosphere is a simple method of depositing the intrinsic (undoped) nanocrystalline layers of metal oxides. We have optimized the deposition of the intrinsic ZnO thin films with submicron thickness 50-500 nm on fused silica glass substrates and investigated the localized defect states below the optical absorption edge down to 0.01 % using photothermal deflection spectroscopy from UV to IR. We have shown that the defect density, the optical absorptance and the related optical attenuation in planar waveguides can be significantly reduced by annealing in air at 400 degrees C.

ZNO THIN FILMS PREPARED BY REACTIVE MAGNETRON SPUTTERING

  • Autoři: Remeš, Z., Stuchlik, J., Purkrt, A., Chang, Y.Y., Vit, J., Stenclova, P., doc. Ing. Václav Prajzler, Ph.D., Nekvindova, P.
  • Publikace: NANOCON 2016 LIST OF ABSTRACTS. Ostrava: TANGER, 2016. ISBN 978-80-87294-68-0.
  • Rok: 2016
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The DC reactive magnetron sputtering of metallic target in oxide atmosphere is a simple method of depositing the undoped (intrinsic) polycrystalline layers of metal oxides. We have optimized the deposition of zinc oxide (ZnO) thin films on fused silica substrates and investigated the localized defect states below the optical absorption edge down to 0,01% using photothermal deflection spectroscopy (PDS) in a broad spectral range from UV to IR. We have shown that the defect density, the optical absorptance and the related optical attenuation in planar waveguides can be significantly reduced by annealing in air at 400°C.

Large Core Three Branch Polymer Power Splitters

  • DOI: 10.13164/re.2015.0885
  • Odkaz: https://doi.org/10.13164/re.2015.0885
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about three branch large core polymer power splitters optimized for connecting standard plastic optical fibers. New point of the design was insertion of a rectangly shaped spacing between the input and the central part of the splitter, which will ensure more evenly distribution of the output optical power. The splitters were designed by beam propagation method using BeamPROP software. Acrylic-based polymers were used as optical waveguides being poured into the Y-grooves realized by computer numerical control engraving on poly(methyl methacrylate) substrate. Measurement of the optical insertion losses proved that the insertion optical loss could be lowered to 2.1 dB at 650 nm and optical power coupling ratio could reach 31.8% : 37.3% : 30.9%.

Optical properties of polymer planar waveguides deposited on flexible foils

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper, we present the properties of flexible polymer planar optical waveguides made of EpoCore deposited on Xerox, Melinex, Hostaphan and Plexiglas flexible foil substrates. EpoClad polymer was used as cladding between a foil substrate and the waveguide layer. Waveguide properties were measured by dark mode spectroscopy for five wavelengths (473, 632.8, 964, 1311 and 1552 nm). Propagation optical loss measurements were done by the fibre probe technique at a wavelength of 632.8 nm (He-Ne laser). The best samples had optical losses of about 0.5 dB·cm-1, and the losses generally did not exceed 1 dB·cm-1. Unlike the other structures that have been presented, our construction is fully flexible, which makes it possible to be used in innovative photonic structures.

Polymer Planar Optical Waveguides for Optical Interconnections

  • DOI: 10.1109/CLEOPR.2015.7376516
  • Odkaz: https://doi.org/10.1109/CLEOPR.2015.7376516
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper reports on technology for realization of an optical planar waveguides for optical interconnections. The waveguiding properties were measured by dark mode spectroscopy and optical loss were measured by the fiber probe technique.

Properties of the Optical Planar Polymer Waveguides Deposited on Printed Circuit Boards

  • DOI: 10.13164/re.2015.0442
  • Odkaz: https://doi.org/10.13164/re.2015.0442
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Paper reports on a technology for realization of an optical planar waveguide layer on duroid substrate and on FR4 fiber reinforced board material printed circuit boards. Waveguide core material was EpoCore polymer and for claddings we used EpoClad polymer. Design of the presented planar waveguides was realized on the bases of modified dispersion equation and was schemed for 633 nm, 964 nm, 1310 nm and 1550 nm wavelength. Waveguiding properties were measured by dark mode spectroscopy while propagation optical loss measurement was done by the fiber probe technique at wavelegnth 633 nm (He-Ne laser). The samples had optical losses lower than 0.5 dB/cm. The best sample has optical losses around 0.25 dB/cm.

"Burying" of channel optical waveguides - relation between near-field measurement and Ag concentration profile

  • Autoři: Tsai, W.S., Liu, Y., Barkman, O., doc. Ing. Václav Prajzler, Ph.D., Stanek, S., Nekvindová, P.
  • Publikace: PROCEEDINGS OF SPIE Vol. 9450. Bellingham: SPIE, 2014. ISSN 0277-786X. ISBN 978-1-62841-566-7.
  • Rok: 2014
  • DOI: 10.1117/12.2070307
  • Odkaz: https://doi.org/10.1117/12.2070307
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Two-step field-assisted ion-exchanged waveguides have been fabricated on a glass substrate. The concentration profiles of the exchanged ions were measured with electron microprobe. The waveguides were characterized under scanning electron microscope and optical microscope for the investigation of burying structures. Guiding mode patterns were characterized with near-field measurement, where symmetric profiles were observed for the burying-type waveguide. The refractive index profiles were also measured with a modified end-fire coupling method. The relation between ion concentration profiles and index profiles were compared for the waveguides with different fabrication process.

Bi-directional triplexer with butterfly MMI coupler using SU-8 polymer waveguides

  • DOI: 10.1117/12.2073239
  • Odkaz: https://doi.org/10.1117/12.2073239
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about a design of a bi-directional planar optical multiplex/demultiplex filter (triplexer) for the optical part of planar hybrid WDM bi-directional transceiver in fiber-to-the-home (FTTH) PON applications. The triplex lightwave circuit is based on the Epoxy Novolak Resin SU-8 waveguides on the silica-on-silicon substrate with Polymethylmethacrylate cladding layer. The triplexer is comprised of a linear butterfly concept of multimode interference (MMI) coupler separating downstream optical signals of 1490 nm and 1550 nm. For the upstream channel of 1310 nm, an additional directional coupler (DC) is used to add optical signal of 1310 nm propagating in opposite direction. The optical triplexer was designed and optimized using beam propagation method. The insertion losses, crosstalk attenuation, and extinction ratio for all three inputs/outputs were investigated. The intended triplexer was designed using the parameters of the separated DC and MMI filter to approximate the idealized direct connection of both devices.

Compact multimode polymer optical 1x2 Y splitters with large core planar waveguide

  • DOI: 10.1007/s12596-014-0210-0
  • Odkaz: https://doi.org/10.1007/s12596-014-0210-0
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design, fabrication and properties of compact large core multimode optical polymer splitter is presented. Norland optical adhesive glue was used as waveguide core layers, poly(methyl methacrylate) was used for substrate and the fabricated planar splitter is connected by standard plastic optical fiber. The structure was designed by beam propagation method and Y-groove for the waveguide core layer into poly(methyl methacrylate) substrate was made by using CNC engraving and polymer core layer was hardness by applied UV ligth. The splitter has insertion loss 5.2 dB for 532.8 nm and 4.1 dB for 650 nm.

Design and modeling of multimode interference structures made by two step ion exchange in glass

  • DOI: 10.1117/12.2070533
  • Odkaz: https://doi.org/10.1117/12.2070533
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design, fabrication and RNF measurement of the optical multi-mode interference power splitter 1 to 2 with graded refractive index is reported. The design was developed by utilizing numerical solutions using the finite difference beam propagation method for operation wavelength 1550 nm. The deposition tests that led to the fabrication of the proposed structures were made after designing the structures. Several samples of optical MMI splitters 1x2 were obtained by Ag+Na+ two step field assisted ion exchange process in molten salt into a new special optical glass substrate for ion exchange technology. The refractive index profile of the channel waveguide was verified by the direct measurement near-filed method by the Refractive Near Field Profilometer.

Design of 1x2 wavelength demultiplexer based on multimode interference

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Nekvindová, P., Varga, M., Kromka, A., Remeš, Z.
  • Publikace: Journal of Optoelectronics and Advanced Materials. 2014, 16(11-12), 1226-1231. ISSN 1454-4164.
  • Rok: 2014
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper discusses the design and optimisation of the 1310/1550 nm multimode interference demultiplexer using the nanocrystalline diamond waveguide structure deposited on a silica-on-silicon substrate. The demultiplexer is designed by the beam propagation method and the simulation shows that for an optimised structure, the output energy of the fundamental mode is 79.3 % at a wavelength of 1310 nm and 76.3 % at 1550 nm. The designed demultiplexer will be suitable for harsh environmental conditions.

Flexible Polymer Planar Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of flexible polymer optical planar waveguides made of epoxy novolak resin as planar waveguides deposited on various foil substrates. The design of the presented planar waveguides was realized on the bases of modified dispersion equation and was schemed for 633 nm, 850 nm, 1310 nm and 1550 nm wavelength. Propagation optical loss measurements were done by the fibre probe technique at wavelegnth 633 nm (He-Ne laser) and samples have optical losses lower than 2 dB•cm-1. Unlike the up-to-now presented structures our constructin is fully flexible what makes it possible to be used in innovative photonics structures.

Large core planar 1 x 2 optical power splitter with acrylate and epoxy resin waveguides on polydimetylsiloxane substrate

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Fabrication process of multimode 1 x 2 optical rectangular planar power splitter suitable for low-cost short distance optical network is presented. The splitters were designed by beam propagation method for standard input/output plastic optical fibre. Materials used for the splitter were: UV acrylate photopolymer polymer or epoxy resin for optical core waveguide layers and Y-groove substrate for the core layer was poly(methyl methacrylate) or polydimetylsiloxane made by replication process on poly(methyl methacrylate) pattern. The insertion losses of 1x2 splitters with acrylate waveguide layers were around 2.7 dB at 532 nm and 4.1 dB at 650 nm and those for epoxy resin waveguide layer were around 3.7 dB at 850 nm. The 1x2 splitters were tested by signal transmission being connected to the internet network by using optoelectronic switches and we achieved the maximum possible transmission data rate as provided by the computer network.

Micro-optical Imaging System for G-PON WDM Transceiver

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper deals with the design of an optical part of a WDM transceiver for G-PON networks based on volume holographic grating triplexer (VHGT) with circle topology of the transceiver optical part. This micro-optical system offers an alternative solution of WDM transceivers and can be used as a WDM multiplexer and demultiplexer of wavelength 1310, 1490 and 1550 nm in ONU (ONT) devices. This micro-optical wavelength distribution system is imaging transmission system consisting of collimating cylindrical lenses in the circle topology with the VHGT filter placed in the middle of the circle. The article is focused on detailed description of the bidirectional micro-optical insertion system of the WDM transceiver optical part. The insertion system is described by ray matrix. The description contains a precise ray analysis of a laser, collimating and fiber coupling system with asymmetric radiation pattern at the input. Considering calculation and measurement results of insertion losses, reflections and crosstalks the influence of these characteristics on laser stability is estimated. The paper also describes an asymmetric laser radiation pattern and its focus limits by coupling into the multi-mode or single-mode output optical fiber. The advantages and disadvantages of the new WDM optical system and an optical WDM triplexer is presented.

Micro-optical insertion system for WDM transceiver

  • DOI: 10.1117/12.2073485
  • Odkaz: https://doi.org/10.1117/12.2073485
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper deals with the design of an micro-optical part of a WDM transceiver based on the circle volume holographic grating triplexer (VHGT) topology. The work is focused on detail description of the bidirectional micro-optical insertion system, especially on the coupling in the transmission direction of the WDM transceiver optical part. This micro-optical wavelength distribution system is imagine transmission system consisted of collimating cylindrical lenses set in the circle topology with the VHGT filter placed in the middle of the circle. The topology is described by ray matrices equations, calculated using analytic and numeric methods and optically measured. Considering simulation and measurement results of micro-optical insertion system the influence of these characteristics on ray path attenuation, diffraction efficiency and transceiver performance is estimated. The paper also discusses limits and conditions of the laser asymmetrical beam focus into the input/output optical fiber.

Nanocrystalline Diamond Optical Planar Waveguides

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Nekvindová, P., Varga, M., Remeš, Z., Kromka, A.
  • Publikace: European Conference on Integrated Optics (ECIO 17th) and the MicroOptics Conference (MOC 19th).. Sophia Antipolis: University of Nice - Sophia Antipolis, 2014.
  • Rok: 2014
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of nanocrystalline diamond planar waveguides. Design of the presented planar waveguides was done on the bases of modified dispersion equation and experimental samples were fabricated by microwave plasma enhanced chemical vapor deposition on silica-on-silicon substrates. Waveguiding properties of our samples were examined by prism coupling technique at 473 nm, 632.8 nm, 964 nm, 1310 nm and 1550 nm wavelengths. It was found that the diamond thin films guided one fundamental mode for all measured wavelengths.

Porphyrin migration and aggregation in a poly(methylmethacrylate) matrix

  • Autoři: Kalachyova, Y., Lyutakov, O., doc. Ing. Václav Prajzler, Ph.D., Tuma, J., Siegel, J., Švorčík, V.
  • Publikace: Polymer Composites. 2014, 35(4), 665-670. ISSN 0272-8397.
  • Rok: 2014
  • DOI: 10.1002/pc.22709
  • Odkaz: https://doi.org/10.1002/pc.22709
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The aging of thin polymer films is interesting for the development of nonlinear optical media. In this study, the optical properties of porphyrin-doped poly(methylmethacrylate) (PMMA) films are investigated before and after annealing. Both absorption and luminescence spectroscopies were used to characterize the changes that occurred during the thermal treatment. The surface and bulk characteristics of the doped films were also measured using atomic force microscopy, X-ray-induced photoelectron spectra, and DSC. We found that the aging of the thin polymer films led the porphyrin molecules to diffuse in the direction of the polymer surface. This led to the random formation of porphyrin aggregates on the surface, followed by absorption band shift and little luminescence quenching. These results suggest that porphyrin-doped PMMA films could be used as long-term stable active optical materials.

The design of polymer planar optical triplexer with butterfly MMI filter and asymmetrical directional coupler

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Paper report about the 3D design of a planar MMI (multi-mode interference) butterfly filter for wavelengths 1490 and 1550 nm using epoxypolymer SU-8 2000 on the Si/SiO2 substrate. In the second part of this paper we discuss the parameters of a planar triplex filter consisting of the butterfly MMI filter and asymmetrical directional coupler (DC).

Annealing of laser patterned PMMA coated with gold and gallium

  • Autoři: Lyutakov, O., Tůma, J., Kalachyova, Y., Huttel, I., doc. Ing. Václav Prajzler, Ph.D., Švorčík, V.
  • Publikace: Journal of Materials Science: Materials in Electronics. 2013, 24(9), 3541-3545. ISSN 0957-4522.
  • Rok: 2013
  • DOI: 10.1007/s10854-013-1282-3
  • Odkaz: https://doi.org/10.1007/s10854-013-1282-3
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Poly(methyl methacrylate) (PMMA) surface was patterned by laser scanning and Ga and Au layers of different thicknesses were sputtered onto modified polymer surface. The metal/PMMA structures were annealed at 160 A degrees C for 1 h and the changes in the surface morphology were examined by AFM and STM techniques. It was found that sufficiently thick and continuous metal coverage protect the underlying pattern structure.

Design and investigation of properties of nanocrystalline diamond optical planar waveguides

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Varga, M., Nekvindová, P., Remeš, Z., Kromka, A.
  • Publikace: Optics Express. 2013, 21(7), 8409-8416. ISSN 1094-4087.
  • Rok: 2013
  • DOI: 10.1364/OE.21.008417
  • Odkaz: https://doi.org/10.1364/OE.21.008417
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Diamond thin films have remarkable properties comparable with natural diamond. Because of these properties it is a very promising material for many various applications (sensors, heat sink, optical mirrors, chemical and radiation wear, cold cathodes, tissue engineering, etc.) In this paper we report about design, deposition and measurement of properties of optical planar waveguides fabricated from nanocrystalline diamond thin films. The nanocrystalline diamond planar waveguide was deposited by microwave plasma enhanced chemical vapor deposition and the structure of the deposited film was studied by scanning electron microscopy and Raman spectroscopy. The design of the presented planar waveguides was realized on the bases of modified dispersion equation and was schemed for 632.8 nm, 964 nm, 1 310 nm and 1 550 nm wavelengths. Waveguiding properties were examined by prism coupling technique and it was found that the diamond based planar optical element guided one fundamental mode for all measured wavelengths. Values of the refractive indices of our NCD thin film measured at various wavelengths were almost the same as those of natural diamond.

Design and investigation of properties of nanocrystalline diamond optical planar waveguides

  • Autoři: Varga, M., doc. Ing. Václav Prajzler, Ph.D., Nekvindova, P., Remeš, Z., Kromka, A.
  • Publikace: IWEPNM2013 International Winterschool on Electronic Properties of Novel Materials - Molecular Nanostructures. Berlin: Technische Universität, 2013. p. 172-173.
  • Rok: 2013
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, deposition and measurement of the properties of nanocrystalline diamond optical planar waveguides.

Design and modeling of symmetric three branch polymer planar optical power dividers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Two types of polymer-based three-branches symmetric planar optical power dividers (splitters) were designed, multimode interference (MMI) splitter and triangular shape-spacing splitter. By means of modeling the real structures were simulated as made of Epoxy Novolak Resin on silicon substrate, with silica buffer layer and polymethylmethacrylate as protection cover layer. The design of polymer waveguide structure was done by Beam Propagation Method. After comparing properties of both types of the splitters we have demonstrated that our new polymer based triangular shaped splitter can work simultaneously in broader spectrum, the only condition would be that the waveguides are single-mode guiding. It practically means that, what concerns communication wavelengths, it can on principle simultaneously operate at two mainly used wavelengths, 1310 and 1550 nm.

Design and Technology of Planar Polymer Waveguide Bragg Grating

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, technology and fabrication of a planar optical polymer waveguide with Bragg grating. There were designed and realized two topological and technological variants of an optical waveguide grating. Polymer materials, namely poly(methyl methacrylate) (PMMA) and Epoxy-Novolak-Resin SU-8 (ENR) were chosen as basic materials of a planar lightwave grating circuit. A thin corrugated layer of the polymer is in the first case deposited on a glass substrate with an optical diffused single mode channel waveguide made by ion exchange. Bragg grating is realized here as the "cladding" layer of the diffused waveguide. In the second case is a corrugated ridge single mode waveguide made on SiO 2 /Si or borosilicate glass substrate.

Design, Fabrication and Properties of Optical Large Core Polymer Planar 1x2 Splitter

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of multimode polymer 1x2 optical planar splitter. The splitters have the insertion loss around 6.96 dB for a structure comprising POF fibers and 4.38 dB (650 nm) with FG910LEC fibers.

Fabrication and Measurement of the Optical Splitters Based on Self-Imaging Effect in multimode Waveguide made by Field Assisted Ion Exchange

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design, fabrication and RNF measurement of graded refractive index profile of the optical multi-mode interference power splitter 1 to 2 with graded refractive index is reported. The design was developed by utilizing numerical solutions using the finite difference beam propagation method for operation wavelength 1550 nm. After designing the structures were made the deposition tests that led to the fabrication of the proposed structures. Several samples of optical MMI splitters 1x2 were obtained by Ag+ - Na+ two step field assisted ion exchange process in molten salt on new special optical glass substrate for ion exchange technology. The refractive index profile of the channel waveguide was verified by the direct measurement near-filed method by the Refractive Near Field Profilometer.

Large Core Polymer Planar Waveguides for Optical Interconnects

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the optical multimode polymer large core waveguides. The waveguide proposal is done for input/output standard 1 mm Plastic Optical Fiber and the design optical waveguides were used for implementation of the optical splitters for optical interconnects. Norland Optical Adhesive and Epoxy Novolak Resin polymers were used as core waveguides.

Optical splitters based on self-imaging effect in multi-mode waveguide made by ion exchange in glass

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Paper deals with design and modeling of single mode optical multi-mode interference structures with graded refractive index is reported. Several samples of planar optical channel waveguides were obtained by Ag + Na + and K + Na + one step thermal ion exchange process in molten salt on GIL49 glass substrate and new special optical glass for ion exchange technology. Waveguide properties were measured by optical mode spectroscopy. Obtained data were used for further design and modeling of single mode channel waveguide and subsequently for the design of 1 to 3 multimode interference power splitter in order to improve simulation accuracy. Designs were developed by utilizing finite difference beam propagation method.

Optické vlastnosti epoxidové pryskyřice dotované ionty vzácných zemin

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Příspěvek popisuje vlastnosti polymerních vrstev s dotací vzácných zemin. Polymer epoxidové pryskyřice Epoxy Novolak Resin byl dotován erbiem, erbiem/ytterbiem a dysprosiem. Tyto vrstvy byly připraveny metodou rotačního lití na křemíkové substráty a na substráty z křemenného skla. U vrstev byla studována infračervená spektra (IČ), absorpční spektra a luminiscenční spektra. IČ spektra prokázala, že polymerní vrstvy s obsahem vzácných zemin obsahují O-H pásy. Absorpční spektra byla použita pro zjištění pásů, které odpovídají pásům vzácných zemin, a luminiscenční spektra byla použita pro měření luminiscence erbia a erbia/ytterbia na vlnové délce kolem 1530 nm a pro luminiscenci dysprosia kolem vlnové délky 1300 nm. Ytterbium bylo použito jako syntetizér pro polymerní vrstvy s dotací erbia jako prostředek k dosažení větší intenzity optického záření na vlnové délce 1530 nm při optickém čerpání na vlnové délce 980 nm.

Planar large core polymer optical 1x2 and 1x4 splitters connectable to plastic optical fiber

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about new approach to design and fabricate multimode 1 x 2 and 1 x 4 Y optical planar power splitter suitable for low-cost short distance optical network. The splitters were designed by beam propagation method using BeamPROPTM software. The dimensions of the splitters were optimized for connecting standard plastic optical fibre with 1 mm diameter. New Norland Optical Adhesives 1625 glues were used as optical waveguide layers and the design structures were completed by CNC engraving on poly(methyl methacrylate) substrate. The best parameters that were achieved with 1x2 splitter were insertion loss around 4.1dB at 650 nm and the coupling ratio 52:48; the best one of the 1x4 splitters had at 650 nm insertion loss around 17.6 dB.

Polymer surface patterning by laser scanning

  • Autoři: Lyutakov, O., Tůma, J., Huttel, I., doc. Ing. Václav Prajzler, Ph.D., Siegel, J., Švorčík, V.
  • Publikace: Applied Physics B: Lasers and Optics. 2013, 110(4), 549. ISSN 0946-2171.
  • Rok: 2013
  • DOI: 10.1007/s00340-012-5291-3
  • Odkaz: https://doi.org/10.1007/s00340-012-5291-3
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Proposed work develops method of polymer surface patterning, suggested in our laboratory. Surface structures with different symmetry and shape are prepared on PMMA and photoresist (Su-8) surface. For surface modification, periodic laser scanning from confocal microscope was used. For optical response improvement meso tetraphenylporphyrine was added either in the polymer bulk or on the top of pristine polymer by vacuum evaporation method. Applications of vacuum deposition methods allow increasing applicability of the technique and preparation of more complex structure. Parameters of the created structures were studied with the aim to better understand the driving forces of the surface modification. Application of prepared structures in photonics as diffraction grating or light coupling elements is also given.

The design of polymer planar optical triplexer with MMI filter and directional coupler

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Optical bidirectional WDM transceiver is a key component of the Passive Optical Network of the Fiber to the Home topology. Essential parts of such transceivers are filters that combine multiplexing and demultiplexing function of optical signal (triplexing filters). In this paper we report about a design of a new planar optical multi-wavelength selective system triplexing filter, which combines a multimode interference filter with directional coupler based on the epoxy polymer SU-8 on Si/SiO2 substrate. The optical triplexing filter was designed using the Beam Propagation Method. The aim of this project was to optimize the triplexing filter optical parameters and to minimize the planar optical wavelength selective system dimensions. The multimode interference filter was used for separation of downstream optical signal in designed optoelectronic integrated WDM transceiver. The directional coupler was used for add of upstream optical signal.

Waveguide Bragg Grating Filters Made from Optical Polymers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about the planar optical waveguide with a diffraction Bragg grating made in an optical polymer, which exhibits filter function useable for Passive Optical Network Fiber to the Home (PON FTTH) and sensor components. There were designed two topological and technological variants of an optical waveguide grating structures. The distribution of optical field and topological constants of waveguide grating was calculated and simulated by RSoft’s BeamPROP and GratingMode programs. The influence of topological parameters of waveguide grating filters like grating groove depth, waveguide layer thickness, length of the grating, etc. on key characteristic properties of the diffraction grating filter including diffraction efficiency, the central reflected wavelength, the bandwidth at 50% of the maximum transmission for guided modes and insertion losses were mainly investigated. Subsequently, structural parameters were optimized with respect to used fabrication methods.

Waveguide periodic structures from optical polymers usable as filter or sensor of temperature

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper deals with the design, implementation, diagnostics, technological and topological optimization of planar waveguide structures with Bragg gratings, filtering and demultiplexing signals in passive optical information networks and sensor applications.

DESIGN AND MODELING OF MULTIMODE INTERFERENCE POWER SPLITTERS MADE BY ION EXCHANGE IN GLASS

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design and modeling of a single mode optical power splitter with graded refractive index is reported. Several samples of optical planar waveguides were obtained by Ag + ↔Na + one step thermal ion exchange process in a molten salt. Waveguide properties were measured by optical mode spectroscopy with the METRICON system. Obtained data were used for further design and modeling of power splitters with Y-branching and Multi-Mode Interference in order to improve simulation accuracy. Designs were developed by utilizing Beam Propagation Method in the BeamPROP software by RSoft Design Group.

DESIGN AND MODELING OF MULTIMODE INTERFERENCE POWER SPLITTERS MADE BY ION EXCHANGE IN GLASS

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design and modeling of single mode optical multi-mode interference structures with graded refractive index is reported. Several samples of optical planar waveguides were obtained by Ag+Na+ one step thermal ion exchange process in molten salt. Obtained data were used for further design and modeling of multi-mode interference power splitters and multiplexers in order to improve simulation accuracy. Designs were developed by utilizing Beam Propagation Method in the BeamPROP software by RSoft Design Group.

DESIGN AND MODELING OF THE SYMMETRIC 1 X 3 OPTICAL POLYMER PLANAR POWER DIVIDER

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design two types of polymer symmetric 1x3 power splitter. First step was to design single mode polymer optical waveguides. Then we continued with designing of three-branch waveguide with triangular shaped spacing and after that we designed 1x3 splitter based on a principle of multi-mode interference. Finally we compared properties of those two structures. The design of the polymer waveguides structure was done by using Beam Propagation Method using RSoft software.

Design and Properties of Planar Polymer Waveguide Bragg Grating Filter

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about the planar optical waveguide filter using a diffraction Bragg grating made in polymer, that shows filter function useable for PON FTTH components. There were designed two topological and technological variants of an optical waveguide grating filters. The first type of the optical waveguide grating filter was realized as a laser-heat shaped layer of PMMA (polymethylmethacrylate) on a glass substrate with an optical ion exchange waveguide. The second type was realized by laser-heat shaping of a SU-8 (epoxypolymer) ridge waveguide on SiO2/Si substrate. The distribution of optical field and topological constants of waveguide grating filters was calculated and simulated by RSoft's BMP and Grating Mode programs. Influence of topological parameters of waveguide grating filters like grating groove depth, waveguide layer thickness, length of the grating, etc. on key characteristic properties of the diffraction grating filter including diffraction efficiency, central reflected wavelength, the bandwidth at 50% of the maximum transmission (FWHM) for guided modes and insertion losses were mainly investigated. The waveguide filters were realized as relief Bragg gratings with roughly sinusoidal cross section of the layer that had influence at a guided optical mode. A Grating's period was chosen to satisfied higher order Bragg's phase condition due to technological limitations of the laser-heat manufacturing process. The grating constant can be continuously varied, which is a major asset for optimization process of Bragg's gratings with space modulated profile. Main properties of the optimized prototypes were then measured and evaluated.

Design of the novel wavelength triplexer using multiple polymer microring resonators

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about new design of wavelength triplexer using multiple polymer optical microring resonators. Triplexer consists of two downstream wavelength channels operating at 1490 ± 10 nm, 1555 ± 10 nm and one upstream wavelength channel operating at 1310 ± 50 nm. The parallel coupled double ring resonator was used for separation of the optical signal band at 1555 nm and filtered out signal bands 1310 nm and 1490 nm. The serially coupled triple optical microring resonator was used for separation of the optical signal band at 1490 nm and filtered out signal bands 1310 nm and 1555 nm. The design was done by using FullWAVETM software by the finite-difference time-domain method. Simulation showed that optical losses for band at 1555 nm were -3 dB and crosstalk between signal bands 1555 nm and 1490 nm was 24 dB. Calculated optical losses for channel 1490 nm were less than -2.5 dB and signal bands at 1555 nm was filtered out with less than 18 dB loss. The bands at 1310 nm were fully filtered out from both downstream wavelength channels operating at bands 1490 nm and 1555 nm.

DESIGN OF THE PLANAR OPTICAL MMI FILTER

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The optical devices which combine multiplexing and demultiplexing function of the optical radiation are frequentlyused as optical distributing filters for application in informatics. The planar optical integrated circuit devices are mostly realized on a Si/SiO2 , Si/Si3N4 and polymer materials, which often use the layer technology. In this paper we report about the design planar MMI (multimode interference) filter for wavelength 1490 nm and 1550 nm, using the polymer SU8 on the Si/SiO2 substrate. The MMI filter use self imagine effect, which is very important for integrated optical interference components. For the simulation of the planar MMI filter was used Beam Prop program package from RSoft company.

Design, Fabrication and Properties of the Multimode Polymer Planar 1 x 2 Y Optical Splitter

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and measurement of the properties of multimode 1 x 2 optical planar power splitter. The splitters were designed with help of OptiCAD software using ray tracing method. The dimensions of the splitters were then optimized for connecting standard Plastic Optical Fiber. Norland Optical Adhesives glues were used as optical waveguide layers and the design structures were completed by CNC engraving on Poly(methyl methacrylate) or Poly(methylmethacrylimide) substrate. The devices have the insertion loss around 7.6 dB at 650 nm and the coupling ratio was 52:48.

HYBRID MICROOPTICAL WDM RECEIVER FOR PON COMMUNICATION

  • DOI: 10.15598/aeee.v10i2.622
  • Odkaz: https://doi.org/10.15598/aeee.v10i2.622
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper presents the design, simulation and construction results of the wavelength vivision multiplex (WDM) optical hybrid receiver module for the passive optical network (PON). The optical WDM receiver was constructed using system of three micromodules in the new circle topology. The optical micromodule contains multimode fiber pigtail 50/125 µm, VHGT filter with collimation lens and two microwave optoelectronics receiver micromodules (OE receiver micromodules). OE receiver micromodules were designed by use small signal equivalent electrical circuit model and noise model, from which the mathematically solved the transmittancefunction, which was used for calculation and simulation of the optimal frequency characteristics and signal to noise ratio. For determine the limit frequency of OE receiver micromodule, the transcendent equation with transmittance function was numerically solved. OE receiver micromodule was composed of decollimation lenses and microwave optoelectronics receivers with bandwidth 2,5 GHz and alternatively in SMD technology with bandwidth 1,25 GHz, using the thin layer hybrid technology. WDM receiver use radiation 1490 nm for internet and 1550 nm for digital TV signals download information.

MICROOPTICAL COLLIMATION SYSTEM FOR WDM RECEIVER WITH A BRAGG VOLUME GRATING

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and measurement of wavelength division multiplexing (WDM) microoptical collimation system for WDM receiver module (WDM-Receiver). The collimation system is represented by ray matrix model and the focal distances obtained in the matrix are verified experimentally. The optic focal system: collimation lens- PIN photodiode (PIN-PD) is characterized to found the dependence between the diameter of the collimated beam and the covered active area in the PIN PD. The optical micromodule uses a microoptics hybrid integration technology with collimation lenses and a volume holographic Bragg grating triplex filter (VHG triplexer) for wavelength multiplex/ demultiplex.

Modeling of the Multimode Polymer Interference Optical Wavelength 1490/1555 nm Demultiplexer

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and modelling of the optical 1490/1555 nm wavelength division multiplexer based on principle of the multimode interference and using Epoxy Novolak Resin waveguide. The structure was designed by Beam Propagation Method.

Optical Properties of Bi-Doped Epoxy Novolak Resin (ENR) Containing Ce, Dy and Y Ions

  • DOI: 10.1002/app.34945
  • Odkaz: https://doi.org/10.1002/app.34945
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this article, we report on the optical properties of Bismuth doped Epoxy Novolak Resin (ENR) co-doped with Dysprosium, Cerium, and Yttrium ions. The polymer layers containing 1.0 to 20.0 at % of Bismuth were fabricated by spin-coating onto silicon or quartz substrates. The properties of the material were studied using several methods with special regards to its potential utilization in photonics devices. Transmission spectra were taken in the range from 350 to 1600 nm, while photoluminescence spectra around 1300 nm were recorded by using excitation of semiconductor lasers operating at 808 nm and at 980 nm (Ex= 250 mW). Optical properties of the samples were evaluated on the bases of the concentration of the Bismuth ions as well as on the concentrations of the co-doping ions and showed close relations between concentration of the dopants and intensity of the luminescence band at 1300 nm. Our results proved that the Bismuth doped ENR has a strong potential for application in active photonics structures, as it has excellent optical properties and very easy and not demanding fabrication procedures.

Optical properties of Poly(Methylmetacrylimide) doped with bismut ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about the optical properties of bismuth doped poly(methylmethacrylimide) layers and bismuth doped poly(methylmethacrylimide) layers co-doped with ytterbium ions. Photoluminescence spectra around 1300 nm were observed and co-doping with ytterbium ions had positive effect on the 1300 nm luminescence. Optical properties of the samples were evaluated on the bases of the concentration of the bismuth ions as well as that of the co-doping with ytterbium ions and showed, e.g., close relations between concentration of the dopants and intensity of the luminescence band around at 1300 nm.

OPTICAL PROPERTIES OF THE POLYMER LAYERS DOPED WITH AN ORGANIC IONIC DYES FOR PHOTONIC APPLICATIONS

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Lyutakov, O., Špirková, J., Oswald, J.
  • Publikace: Proceedings of Electronic Devices and Systems EDS 2012. Brno: VUT v Brně, FEKT, 2012. pp. 7-11. ISBN 978-80-214-4539-0.
  • Rok: 2012
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of Epoxy Novolak Resin polymer doped with Rhomadine and Diethylthiadicarbocyanine organic ions dyes. We studied optical properties for active photonics applications. Photoluminescence measurement was done at room temperature by using lasers operating at λ ex = 532 nm and at λ ex = 415 nm. The Rhomadine doped samples exhibited emission at 595 nm and Diethylthiadicarbocyanine doped samples exhibit emission at 593 nm and around 722 nm depend on the concentration doping. The obtained results show that the samples have suitable properties for photonics applications.

The manipulation of carbon nanotubes on a polymer surface using a laser beam

  • Autoři: Lyutakov, O., Huttel, I., Siegel, J., doc. Ing. Václav Prajzler, Ph.D., Tuma, J., Švorčík, V.
  • Publikace: Journal of Materials Science. 2012, 47(11), 4585-4588. ISSN 0022-2461.
  • Rok: 2012
  • DOI: 10.1007/s10853-012-6319-0
  • Odkaz: https://doi.org/10.1007/s10853-012-6319-0
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Controlled noninvasive manipulation of porphyrin-doped single-walled carbon nanotubes (SWCNT) by laser beam is described. SWCNT/porphyrin complexes have been deposited on a polymer surface and irradiated by a scanning beam of laser light with the wavelength of 405 nm. Laser energy was absorbed by the porphyrin and converted into heat through an energy transfer within the complexes. This led to periodical deformation of the initially flat polymer surface. As a result of the surface deformation the SWCNTs or SWCNT bundle move in the direction given by the laser scanning. It was proved that SWCNTs can be moved to a desired position using the focused laser beam.

THE PLANAR OPTICAL WAVELENGTH SELECTIVE SYSTEM WITH THE MMI FILTER AND THE DIRECTIONAL COUPLER

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The planar design of the WDM transceivers are mostly realized on a Si/SiO2 dielectric materials, which often use the layer technology. The optical devices which combine multiplexing and demultiplexing function of the optical radiation (triplex filters) frequently used the optical distributing thin filters or directional filters. These integrated WDM transceivers have dimensions of several centimeters and compatible planar arrangement (set-up) of the optical and optoelectronic components. In the first part of this paper we report about the design planar MMI interference filter and directional coupler for wavelengths 1310nm,1490nm,1550nm, using epoxipolymer SU-8 2000 on the Si/SiO2 substrate. Second part will be devoted to optimizing the coupling parameters between MMI interference filter and a directional coupler to minimize insertion loss and crosstalk. The design were made with respect to the use of the planar optical wave selective system in a optical communications. The aim is to improve the optical parameters in addition to the reduction in size the planar optical wavelength selective system. Based on the designed parameters will then be made realization the planar optical wavelength selective system planar optical wavelength selective assembly usefull in optical networks as wavelength selective triplex filter.

Design and construction of a WDM transceiver with VHGT using hybrid integration technology

  • DOI: 10.1002/pssc.201084068
  • Odkaz: https://doi.org/10.1002/pssc.201084068
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and construction of WDM bidirectional transceiver module (TRx) for the passive optical network (PON) of a fiber to the home FTTH topology. The TRx uses a microoptics hybrid integration technology with volume holographic Bragg grating triplex filter (VHGT) and a collimation lenses for wavelength multiplexing/demultiplexing. Our optical WDM transceiver TRx has been constructed using system of a four micromodules in the new circle topology. The optical micromodul with VHGT filter, two optoelectronics receivers micromodules for receiving download information (internet and digital TV signals) and optoelectronic transceiver micromodul for transmitting of a upload information.

Design and Modeling of the ENR Polymer Microring Resonators Add/Drop Filter for Wavelength Division Multiplexing

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Střílek, E., Huttel, I., Špirková, J., Jurka, V.
  • Publikace: ElectroScope. 2011, 2011(IV), 1-5. ISSN 1802-4564.
  • Rok: 2011
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, modeling, fabrication and properties of the polymer optical microring resonator. First step was to design single mode optical polymer ridge waveguides by using BeamPROP TM software and then optical polymer microring resonator was designed by using FullWAVE TM software. The design of the single mode waveguides was done for the operating wavelengths 650 nm and 1550 nm. The design of the microring resonators was done for operating wavelength 1550 nm and for elimination wavelength 1490 nm. The resonator was designed on the bases of optical polymer waveguides Epoxy Novolak Resin deposited onto silica-on-silicon substrate. We used Polymethylmethacrylate as cover layers, or eventually, no cover layer was applied. Deposition tests of the designed structures were done by using standard photolithography process and electron lithography process.

Design and Modeling of the Single Mode Optical Glass Waveguides for Passive Photonics Structures

  • Autoři: Barkman, O., Nekvindová, P., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: 23rd Conference and Exhibition on Optical Communications 2011 - Scientific Section Proceedings. Praha: Action M, 2011. p. 5-8. ISBN 978-80-86742-32-8.
  • Rok: 2011
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Design, modeling and fabrication of a single mode optical channel waveguide with graded refractive index is reported. Several samples of optical planar waveguides were obtained by Ag+ Na+ and K+ Na+ one step thermal ion exchange process in a molten salt. Waveguide properties were measured by optical mode spectroscopy with the METRICON system. Obtained data were used for further design and modeling of surface channel waveguides in order to improve simulation accuracy. Designs were developed by utilizing Beam Propagation Method in the BeamPROP software by RSoft Design Group. The single mode channel waveguide was designed for operation wavelength band of 260-1625 nm.

Design and Modelling of the Integrated Polymer Microring Resonators on Silicon Substrate

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about new polymer optical microresonators (OM) optical filters designed for operating wavelengths 1550 nm and filtering out wavelength 1490 nm. The first step was to design a single mode polymer waveguide by using BeamPROPTM software and after that a microring resonators were designed by Finite-Difference Time-Domain method using FullWAVETM software.

Design of Epoxy Novolak Resin Optical Waveguides for Demultiplexers Based on Multimode Interference and Optical Ring Resonators

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design of optical polymer waveguides for Y-branch power splitters, wavelength demultiplexers based on multimode interference and optical ring resonators. Epoxy novolak resin was chosen as core waveguide materials due to excellent properties and easy fabrication process. Waveguides was fabricated onto silica-on-silicon substrate due to easy integration process with other optical and electrical elements. Design of the waveguides was done by using RSoft software and waveguides were fabricated by standard photolithography process. Propagation optical loss measurements were done by using the cut-back method and the best samples had optical losses around 0.5 dB/cm at 1310 nm.

Design of Y-Branch Optical Polymer Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design of 1 x 2 and 1 x 4 polymer power optical Y-branches. First we design single mode polymer optical structure than optical 1x2 splitters were design by using BeamPROP software and finally optical power splitter 1x4 was proposed. Epoxy Novolak Resin polymer was chosen as core waveguides layer due to excellent optical properties and easy fabrication process. Silica on silicon layer was used as substrates and Polymethylmethacrylate was used as protection cover layer. Design structures were fabricated by photolithography process and optical properties were measured by Metricon prison system.

Design, Fabrication and Properties of Rib Poly(methylmethacrylimide) Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the polymer optical waveguides deposited on silica-on-silicon substrate. The design of the waveguides is based on a concept that geometric dimensions of the single mode polymer waveguide are determined by geometrical parameters of the silica layer. The design of the waveguides was schemed for 650 nm, 850 nm, 1310 nm and 1550 nm wavelength. The design of the presented planar waveguides was realized on the bases of modified dispersion equation while the ridge waveguides design was proposed following the Fischbeck concept. Both designs were refined applying RSoft software using beam propagation method. Poly(methylmethacrylimide) was used as the waveguide core material and polymethylmethacrylate was used as a cover protection layer. Propagation optical loss measurements were done by using the cut-back method and the best samples had optical losses lower than 0.6 dB/cm at 650 nm, 1310 nm and 1550 nm.

Epoxy Novolak Resin Optical Microring Resonator

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the polymer optical microring resonator. First step was to design single mode rib waveguides by using BeamPROP software and then microring resonator was designed by using FullWAVE software, which is part of the RSoft software. The design was done for operating wavelength 1550 nm. The resonator was designed on the bases of optical polymer waveguides epoxy novolak resin deposited onto silica-on-silicon substrate. Two types of cover layers, Polymethylmethacrylate, Cytop, or, eventually, no cover layer was applied. Depositions tests for fabrication of the design structures were done by using standard photolithography process and electron lithography process.

Microoptical and Microwave Design and Construction of a Micromodules for WDM Receiver

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper presents design a novel topology and technology solution of IC microoptical hybrid integrated WDM receiver, composed of the optical and optoelectronic micromodules. The optical micromodule use volume holographic grating triplexer (VHGT) as unique optical multiwavlength demultiplexing element in WDM microsystem, The downstream microoptical imagine system was verified by construction and measurement of the microoptical hybrid integrated WDM receiver. Very low insertion optical losses and optical crosstalk of VHGT element imply the high sensitivity and the transmit distance of optical SM fiber. Further work was concentrated on design and construction of WDM transceiver realized by planar lightwave circuit hybrid integration technology. The optical part will be solved by polymer or glass interference filter or microoptical resonators.

Microoptical Collimation System for WDM Receiver with a Bragg Volume Grating

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and measurement of wavelength division multiplexing (WDM) microoptical collimation system for WDM receiver module (WDM- Receiver). The collimation system is represented by ray matrix model and the focal distances obtained in the matrix are verified experimentally. The optic focal system: collimation lens- PIN photodiode (PIN-PD) is characterized to found the dependence between the diameter of the collimated beam and the covered active area in the PIN PD. The optical micromodule uses a microoptics hybrid integration technology with collimation lenses and a volume holographic Bragg grating triplex filter (VHGT) for wavelength multiplexing/ demultiplexing.

Optické planární vlnovody z pryskyřice Epoxy Novolak Resin

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Příspěvek popisuje návrh, výrobu a vlastnosti optických polymerních vlnovodů. Vlnovody byly navrženy tak aby fungovaly na křemíkových substrátech a na substrátech z galia arzenidu, a aby pracovaly na vlnových délkách 650 nm a 1310 nm. Jádro vlnovodu tvoří nový typ polymeru Epoxy Novolak Resin. Návrh vlnovodu byl proveden pomocí programu od fy RSoft, který využívá beam propagation metod. Vlnovody byly vyráběny metodou spin coating a tvar vlnovodů byl vytvářen pomocí optické litografie. U vlnovodů byl měřen optický útlum metodou dvou délek a nejlepší vlnovody měly optický útlum menší než 1 dB/cm na vlnových délkách 650 nm a 1310 nm.

Polymer Optical Microring Filter for Passive Optical Network Applications

  • DOI: 10.1109/IQEC-CLEO.2011.6193633
  • Odkaz: https://doi.org/10.1109/IQEC-CLEO.2011.6193633
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design of the Epoxy Novolak Resin polymer optical microring resonator filter operating at 1490 nm. The design was done by using FullWAVETM software and MR was constructed by using electron beam lithography.

Simple way of fabrication of Epoxy Novolak Resin optical waveguides on silicon substrate

  • DOI: 10.1002/pssc.201084031
  • Odkaz: https://doi.org/10.1002/pssc.201084031
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the polymer optical waveguides. The design of the waveguides is based on a concept that geometric dimensions of the single mode polymer waveguide are determined by geometrical parameters of the silica layer. The design of the presented planar waveguides was realized on the bases of modified dispersion equation while the ridge waveguides design was proposed following the Fischbeck concept. Epoxy Novolak Resin was used as the waveguide core material and polymethylmethacrylate was used as a cover protection layer. Propagation optical loss measurements were done by using the cut-back method. The best samples had optical losses lower than 1.5 dB/cm at 650 nm and 0.5 dB/cm at 1310 nm.

The Microoptical and Microwave Design and Construction of a WDM Receiver with Bragg Volume Grating Using Hybrid Integration Technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about microoptical and microwave design and construction of WDM receiver module useable for the passive optical network (PON) of a fiber to the home (FTTH) topology. The WDM receiver uses a microoptics hybrid integration technology with volume holographic Bragg grating triplex filter (VHGT) and a collimation lenses for wavelength demultiplexing. A VHGT filters are ideal optical beam distribution element having high diffraction efficiency wavelength and very low insertion loses and optical crosstalk. The optical imaging system was design in the paraxial approximation by ray-transfer matrix. The optical WDM receiver was constructed using system of a three micromodules in the new circle topology, the optical micromodule and two microwave optoelectronics receiver micromodules (OE receivers). WDM receiver use radiation 1490 nm for internet and 1550 nm for digital TV signals download information.

WDM hybrid microoptical transceiver with bragg volume grating

  • DOI: 10.1117/12.911293
  • Odkaz: https://doi.org/10.1117/12.911293
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper presents the design, simulation and construction results of the wavelength division multiplex bidirectional transceiver module (WDM transceiver) for the passive optical network (PON) of a fiber to the home (FTTH) topology network. WDM transceiver uses a microoptical hybrid integration technology with volume holographic Bragg grating triplex filter -VHGT and a collimation lenses imagine system for wavelength multiplexing/ demultiplexing. This transmission type VHGT filter has high diffraction angle, very low insertion loses and optical crosstalk, which guide to very good technical parameters of transceiver module. WDM transceiver has been constructed using system of a four micromodules in the new circle topology.

Design and construction of a WDM transceiver VHGT using hybrid integration technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and construction of WDM bidirectional transceiver module (TRx) for the passive optical network (PON) of a fiber to the home FTTH topology. The TRx uses a microoptics hybrid integration technology with volume holographic Bragg grating triplex filter (VHGT) and a collimation lenses for wavelength multiplexing/ demultiplexing. Our optical WDM transceiver TRx has been constructed using system of a four micromodules in the new circle topology. The optical micromodul with VHGT filter, two optoelectronics receivers micromodules for receiving download information (internet and digital TV signals) and optoelectronic transceiver micromodul for transmitting of a upload information.

Design and construction of a WDM transceiver VHGT using hybrid integration technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and construction of WDM bidirectional transceiver module (TRx) for the passive optical network (PON) of a fiber to the home FTTH topology. The TRx uses a microoptics hybrid integration technology with volume holographic Bragg grating triplex filter (VHGT) and a collimation lenses for wavelength multiplexing/ demultiplexing. Our optical WDM transceiver TRx has been constructed using system of a four micromodules in the new circle topology. The optical micromodul with VHGT filter, two optoelectronics receivers micromodules for receiving download information (internet and digital TV signals) and optoelectronic transceiver micromodul for transmitting of a upload information.

Design and Construction Transceiver Module Using Polymer PLC Hybrid Integration Technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Planar lightwave circuit (PLC) hybrid integration technology enables us to construct component by combining PLC with passive function and active optoelectronics devices hybridized on a PLC. The contribution is an overview of the PLC hybrid integration technology and describes experiment and simulation, which led to the construction hybrid integrated PLC for optoelectronics information receiving and transmitting. Our optical triplex TRx module has been designed with RSoft simulation programs and constructed using a polymer PLC hybrid integration technology. The transceiver module consists of a planar optical epoxy polymer waveguides with a volume holographic grating triplex filter, surface-illuminated photodetectors and spot-size converted Fabry-Pérot laser diode in SMD package. An optical TRx module transmits a 1310 nm radiation upload and receives a 1490 nm download data as well as a 1550 nm download digital video signals for wavelength division multiplexing WDM cable TV application.

Design of Polymer 1 x 3 Multimode Interference Optical Power Splitter Operating at 650 nm and 1310 nm

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about design of the polymer optical 1 x 3 multimode interference (MMI) splitter operating at 650 and 1310 nm. The polymer splitter was designed by using RSoft software based on beam propagation method. Epoxy novolak resin polymer was used as core waveguides layer, silicon substrate with silica layer was used as buffer layer and polymethylmethacrylate was used as protection cover layer. Simulation showed that the maximum output energy for 1310 nm is 3x31 % for Lmmi= 382 μm (length of MMI) while for the splitter supporting both 650 and 1310 nm the maximal output energy will be 3x29.5% at Lmmi= 379 μm.

Design of Polymer Optical Waveguides for Wavelength Demultiplexers Based on Multimode Interference and Optical Ring Resonators

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design of optical polymer waveguides for Y-branch power splitters, wavelength demultiplexers based on multimode interference and optical ring resonators. Various materials are used for realization of the optical photonics structure including glass, optical crystal and semiconductors. These materials and technologies used for fabrication of the waveguides are rather complex and expensive. Therefore new materials like polymers are very attractive candidates for integrated optical structures. Polymer optical waveguides have a lot of advantages including well-controlled refractive indices, good thermal stabilities, high transparency in the visible and near-infrared spectra and low optical losses. Photonics structures fabricated from polymers are also low cost and require only simple production technology.

Design of polymer wavelength splitter 1310 nm / 1550 nm based on multimode interferences

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we are going to report about design of 1 x 2 1310/1550 nm optical polymer wavelength division multiplexer. There is a growing interest in Multimode Interference (MMI) couplers in the design of photonics circuits due to huge potential in new optical communications system. In the literature there are only few papers reporting about various materials used in the design and realization of MMI based structures, most of them are semiconductors. Among them only two papers described MMI structure based on polymer materials.

Design, Fabrication and Measurement Polymethylmethacrylate Optical Waveguides Prepared by Modification of Surface Profile by Applying Electric Field

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper, we describe results of our recent experiments on electric field preparation of the optical waveguides on PMMA films, their calculation and measurements. Planar PMMA films were prepared on Si/SiO2 wafers and measured using waveguiding technique. Micro-sized patterns were created on thin PMMA films by the effect of external electric field, perpendicular to the film surface. Waveguiding properties of prepared structures were checked by fitting optical fibre connected to laser light source. Optical losses of the farbicated channel waveguides were measured by using the cut-back method at wavelength 650 nm and output field was obtained by beam propagation analyzer BP104IR. Properties of the PMMA layers were simulated by beam propagation method by using BeamProp module from RSoft software.

Microoptical triplexer systém with high efficeincy for WDM hybrid optoelectronic receivers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper presents the design, construction and measuring of an microoptical WDM demultiplexing system composed by collimation lenses and optical double grating filter VHGT with high diffraction efficiency for receiving part of hybrid microoptical WDM transceiver (WDM receiver) for PON-FTTH topology. The hybrid integration technology achieves a cost-effective optoelectronic receiver. We found the dimension parameters of the microoptical system from the MMF (mutlimode fiber) across the collimation lens - triplexer - collimation lens complex to surface PIN photodiode. The results were to obtain the optimal coupling with maximal sensitivity of WDM receiver. A piezoelectrically driven ten axis micromanipulator was used to set the triplexer to the correct diffracted beams position, in the alignment process.

Návrh a realizace WDM transceiveru realizovaného hybridní technologií

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Příspěvek pojednává o návrhu a konstrukci WDM optoelektronického transceiveru, který je klíčovým prvkem pro účastnickou stranu sítě PON-FTTH, a který je realizovaný mikrooptickou hybridní technologií. Základem konstrukcí klasických mikrooptických WDM modulů pro sítě PON-FTTH jsou řešení s distribuovanými hranoly, zrcadly a diskrétními optoelektronickými prvky, umístěnými v pouzdrech TO fixovaných do těla modulu. Planární řešení WDM transceiverů jsou realizována na dielektrických materiálech Si/SiO2 za použití vrstvových technologij Jako optické členy pro multiplexaci a demultiplexaci (MUX/DEMUX) záření často využívají distribuovaných optických tenkovrstvých filtrů, nebo směrových vazebních členů. Tyto integrované WDM transceivery mají rozměry i několik centimetrů a planárně kompatibilní uspořádání optických a optoelektronických prvků.

Optical and Spectroscopic Properties of Polymer Layers Doped with Rare Earth Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about Erbium (Er), Ytterbium (Yb), Europium (Eu), Neodymium (Nd), Thulium (Tm), Holmium (Ho), Praseodymium (Pr) and Dysprosium (Dy) doped polymer layers on silicon and quartz substrate. We chose these RE ions because Tm3+ doped photonics materials can have emission bands around 1470 nm and 1600-2100 nm. Er3+ doped materials can emit at 1530 nm. Ho3+ and Yb3+ ions were used as co-dopants. Tm3+ doped polymers were co-doped with Ho3+ ions and Er3+ doped polymers were co-doped with Yb3+ ion. Trivalent Dy3+ ion is studied for emission at 1300 nm. Other RE ions were chosen for photoluminescence study in visible region.

Optical PMMA Waveguides Fabricated by Modification of Refractive Index Applying Electric Field

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper, we describe results of our recent experiments on electric field assisted patterning of thin polymethylmethacrylate (PMMA) layers. Micro-sized patterns were created on thin PMMA films by the effect of external electric field, perpendicular to the film surface. The PMMA film, prepared by spin-coating onto Si or Si/SiO2 wafer, was heated to the fluid temperature (275°C) and a linear pattern was created by the effect of electric field produced by a strip electrode. The dependence of the form and size of the created patterns on the intensity of the electric field, exposure time and initial film thickness was examined. Wave guiding properties were analyzed by mode spectroscopy, optical losses were measured by dispersive method and the created patterns were analyzed by optical microscopy and profilometer.

Preparation of rib channel waveguides on polymer in electric field

  • Autoři: Lyutakov, O., Tuma, J., doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Hnatowicz, V., Švorčík, V.
  • Publikace: Thin Solid Films. 2010, 519(4), 1452-1457. ISSN 0040-6090.
  • Rok: 2010
  • DOI: 10.1016/j.tsf.2010.08.019
  • Odkaz: https://doi.org/10.1016/j.tsf.2010.08.019
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Micro-sized patterns were created on oligomer (Su-8) films by the effect of external electric field, perpendicular to the film surface. Structures with varying parameters were prepared and the growth of continuous or dot-like structures was observed. The mechanism dominating the structure growth was examined and found to be a function of experimental conditions. The dependence of the form and the size of the created patterns on the intensity of the electric field, exposure time and initial distance between mask and polymer surface was investigated. Waveguiding properties of the linear pattern, produced by the above technique, were examined and the following parameters were obtained: propagation loss - 2-3 dB/cm, effective refractive index - 1.6276, number of supported modes - 30).

Properties of Epoxy Novolak Resin Layers Doped with Bismuth for Photoluminescence Near 1300 nm

  • DOI: 10.1002/app.32039
  • Odkaz: https://doi.org/10.1002/app.32039
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report on the optical properties of bismuth ions doped Epoxy Novolak Resin (ENR). The polymer layers containing 1.0 to 20.0 at. % of bismuth were fabricated by spin-coating onto silicon or quartz substrates. The properties of the material were studied using several methods with special regards to its potential utilization in photonics devices. Photoluminescence spectra around 1300 nm were recorded by using excitation of semiconductor lasers operating at 808 nm (Ex= 500 mW). Optical properties of bismuth doped Epoxy Novolak Resin were evaluated on the bases of the concentration of the bismuth ions involved in the samples and showed, e.g. close relations between concentration of the dopants and intensity of the luminescence band at 1300 nm. IR spectra showed only negligible changes in the original substrate resin. Our results proved that the bismuth doped ENR have a potential for utilization in photonics devices.

Simple fabrication of Epoxy Novolak Resin optical waveguides on silicon substrate

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about polymer optical waveguides fabricated on silica on silicon. The presented waveguide design is based upon modification of concept proposed by Fischbeck which was deduced by Marcatili. This concept is based on idea that geometric dimension of the single mode polymer waveguide is specified by silica layer. The design of the presented waveguides was also proposed applying RSoft software using beam propagation method. The waveguide refractive indices of the optical layers were measured by ellipsometry in spectral range from 400 nm to 1600 nm before the proposal. The obtained values were used for theoretical design to make the simulation accurate. The design of the waveguides was done for two wavelength 650 nm and 1310 nm respectively.

Bismuth(III) Doped Polymer Layers for Telecommunication Applications

  • DOI: 10.1109/CLEOPR.2009.5292489
  • Odkaz: https://doi.org/10.1109/CLEOPR.2009.5292489
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Bismuth(III)-doped Epoxy Novolak Resin polymer as a novel promising photonics material was designed for applications in 1310 nm telecommunication window. It was fabricated by spin coating on silicon or silica substrates and its optical properties are evaluated in the terms on the Bi(III) concentration.

DESIGN AND CONSTRUCTION WDM TYPE TRIPLEX OPTICAL RECEIVER MODULE USING SYSTEM MULTIMODE POLYMERIC PLC HYBRID INTEGRATION TECHNOLOGY

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about more detail design and constructions of the WDM triplex optical receive part of the triplex transceiver module for subscribe part passive optical network PON-FTTH. The triplex optical receiver module consists of an epoxy novolak resin polymer or a microoptic planar lightwave circuit (PLC) made by hybrid integration technology with volume holographic grating triplex filter VHGT and surface-illuminated photodetectors in SMD package. The hybrid PLC has composed from two parts - a microoptical or polymer planar optical waveguide including VHGT filter section and an optoelectronic microwave section. The both parts are placed on the composite substrate.

Design and construction WDM type triplex optical receiver module using system multimode polymeric PLC hybrid integration technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about more detail design and constructions of the WDM triplex optical receive part of the triplex transceiver module for subscribe part passive optical network PON-FTTH. The triplex optical receiver module consists of a epoxy novolak resin polymer or a microoptic planar lightwave circuit (PLC) made by hybrid integration technology with volume holographic grating triplex filter VHGT and surface-illuminated photodetectors in SMD package. The hybrid PLC has composed from two parts - a microoptical or polymer planar optical waveguide including VHGT filter section and an optoelectronic microwave section. The both parts are placed on the composite substrate.

Designed and Fabrication of ENR Polymer Rib Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the polymer optical channel waveguides. Epoxy novolak resin polymer was used as the waveguide core material and polymethylmethacrylate was used as a cover layer. Samples were fabricated by spin coating on silica on silicon substrate. The design of the waveguide was done by RSoft software using beam propagation method. The fabricated channel waveguides had optical losses lower than 3.0 dB/cm. The best samples had optical losses lower than 1.0 dB/cm at 650 nm and 0.5 dB/cm at 1310 nm.

Designed and Fabrication of ENR Polymer Rib Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design, fabrication and properties of the Epoxy Novolak Resin (ENR) polymer rib optical waveguides. Polymer waveguides were fabricated on silicon substrate with silica buffer layer and Epoxy novolak resin was used as the waveguide core material. Polymethylmethacrylate was used as a cover protection layer. The optical waveguides were designed by using software RSOFT using Beam propagation method and the minimum (critical) waveguiding thicknesses of the deposited layers were calculated using dispersion equation. Polymer layers were fabricated by spin coating and optical waveguides were form by using standard photolithography process. Propagation optical loss measurements were carried at 650 nm and 1310 nm using the cut-back method and the best samples had optical losses lower than 1.0 dB/cm at 650 nm and 0.6 dB/cm at 1310 nm.

New Technique for Preparation of Epoxy Novolak Resin Polymer Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about fabrication of polymer optical channel waveguides using non-contact and non-photolithography technology procedure based on lithography induced self-construction method. The reported waveguides were fabricated by spin coating deposition of epoxy novolak resin on silica on silicon or on silicon substrates. We studied optimization of preparation of the polymer structures and the influence of electric field on the properties of the ENR optical waveguides.

Optical properties of erbium and erbium/ytterbium doped polymethylmethacrylate

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report on the fabrication and properties of Er3+ and Er3+/Yb3+ doped Polymethylmethacrylate (PMMA) layers. The reported layers were fabricated by spin coating on silicon or on quartz substrates. Infrared spectroscopy was used for an investigation of O-H stretching vibration. Measurement were made of the transmission spectra in the wavelength ranges from 350 to 700 nm for the Er3+ doped samples and from 900 to 1040 nm for the Yb3+ doped samples. The refractive indices were investigated in the spectral range from 300 to 1100 nm using optical ellipsometry and the photoluminescence spectra were measured in the infrared region.

Optical Properties of Gallium Nitride Layers Doped with Erbium and Erbium + Ytterbium Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of erbium and erbium + ytterbium doped gallium nitride layers.

Optical properties of PMMA doped with erbium(III) and ytterbium(III) complexes

  • DOI: 10.1002/pen.21418
  • Odkaz: https://doi.org/10.1002/pen.21418
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report on fabrication and optical/spectroscopic properties of Polymethylmethacrylate (PMMA) doped with RE (Er3+ and Er3+/Yb3+) ions. Infrared spectroscopy revealed only very weak O-H stretching vibration peaks in the samples. Measurement of transmission spectra in the wavelength ranges from 300 to 700 nm for Er3+ doped samples and from 900 to 1050 nm for Yb3+ doped samples, enabled us to observe the 4G11/2 (377 nm) and 2H11/2 (519 nm) transmission bands typical for Er3+ doped samples, as well as the 2F5/2 (975 nm) band typical for Yb3+ doped samples. Under excitation at 980 nm, at room temperature, the characteristic Er3+ emission at 1530 nm was also observed with improving trend when the higher Rare Earth (RE) concentrations were applied. The results indicate that the PMMA reveals very low tendency to the RE clustering, which, together with low cost and easy fabrication make it a material with a great potential in the active photonics devices.

Pattern formation in PMMA film induced by electric field

  • DOI: 10.1002/polb.21718
  • Odkaz: https://doi.org/10.1002/polb.21718
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Micro-sized patterns were created on thin poly(methyl methacrylate) (PMMA) films by the effect of external field, perpendicular to the film surface. The PMMA film, prepared by spin-coating onto Si wafer, was heated to the fluid temperature (275 °C) and a linear pattern was created by the effect of electric field produced by a strip electrode. In another experiment, a round pattern was created as a result of local laser heating of the PMMA film under homogenous electrical field. The created patterns were analyzed by optical microscopy and profile meter. The dependence of the form and size of the created patterns on the intensity of the electric field, exposure time, and initial film thickness was examined. Wave guiding property of a linear pattern, produced by the above technique, was examined in a simple experiment.

Performance of the Planar Hybride Optoelectronic Receiver

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The article report on theoretical results and measured parameters of the VHGT triplex filter, which was used for input part of the bidirectional transceiver TRx module. The photonic receiver is the main part of the hybrid integrated microwave optoelectronic transceiver TRx (transceiver Trx).

Polymer Layers Doped with Rare Earth Ions for Photonics Applications

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about fabrication and properties of polymer layres doped with rare earth (RE) ions. The reported layers were fabricated by spin coating onto Si, Si/SiO2 or onto glass substrates. For the RE doping RE chloride or RE fluoride powder dissolved in C5H9NO or C2H6OS were used. The research was focused on investigation of the influence of the amount of the dopants on the transmission and photoluminescence spectra.

POLYMER OPTICAL WAVEGUIDES FOR HYBRID PHOTONICS APPLICATIONS

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and fabrication of the low loss polymer optical waveguides for hybrid optoelectronics applications. The waveguides were designed by using beam propagation method and deposited by spin-coating onto GaAs substrates. Epoxy Novolak Resin polymer was used as core waveguides layer, Cytop was used as buffer layer and Polymethylmethacrylate was used as protection cover layer. The channel waveguides were formed by photolithography process. The best samples had optical losses around 0.63 dB/cm at 650 nm and 0.53 dB/cm at 1310 nm.

Spectroscopy Properties of Epoxy Novolak Resin Doped with Rare Earth Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about new spectroscopy properties of rare earth doped epoxy novolak resin polymer. The polymer samples were doped with rare earths like praseodymium, neodymium, samarium, europium or dysprosium. The samples were fabricated by spin coating on silicon substrates or by pouring the polymers containing the rare earth into bottomless molds placed on quartz substrates. Infrared spectroscopy was used for checking the presence of the O-H stretching vibration in the samples and how they were subsequently affected by various concentrations of the doping rare earth salts. Typical bands corresponding to the rare earth ions in the region from 350 nm to 2900 nm of the absorption spectra were studied in order to find optimal concentrations of the particular dopants.

The VHGT Triplex Filter for the Hybrid Photonic Integrated Circuits with the Polymer Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This paper report about design and construction of the bidirectional transceiver TRx module for subscriber part of the passive optical network PON for a fiber to the home FTTH topology. The TRx module consists of a epoxy novolak resin polymer planar lightwave circuit (PLC) hybrid integration technology with volume holographic grating triplex filter VHGT, surface-illuminated photodetectors and spot-size converted Fabry-Pérot laser diode in SMD package. The hybrid PLC has composed from a two parts - polymer optical waveguide including VHGT filter section and a optoelectronic microwave section. The both parts are placed on the composite substrate.

VLNOVĚ SELEKTIVNÍ OPTICKÁ ROZBOČNICE SE SOUSTAVOU PLANÁRNÍCH OPTICKÝCH POLYMERNÍCH VLNOVODŮ

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    V tomto příspěvku pojednáme o měření vlastností vlnově selektivní optické rozbočnice "VHGT" (Volume Holografic Greating Triplexer) realizované objemovou holografickou mřížkou navazující na soustavu planárních polymerních multividových optických vlnovodů. Vlastnosti výše uvedené holografické mřížky jsou zkoumány s ohledem na použití v hybridním integrovaném optoelektronickém obvodu transceiveru pro sítě PON-FTTH. Návrh navazující soustavy polymerních vlnovodů vychází z vlastností vlnově selektivní rozbočnice ověřených měřeními a porovnaných s údaji udávanými výrobcem (zejména difrakčními úhly.

WDM PLANÁRNÍ OPTOELEKTRONICKÝ POLYMEROVÝ PŘIJÍMAČ

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Článek popisuje návrh a konstrukci WDM planárního optoelektronického triplexního přijímače (OTP), který bude součástí planárního WDM triplexního transceiveru pro sítě PON - FTTH. OTP je realizován hybridní integrační technologií. V článku jsou popsány klíčové vlastnosti holografického triplexního mřížkového Braggovského filtru (triplexního filtru), využívaného v přijímači, a podmínky navázání záření na multivi- dový polymerový vlnovod. Dále je ukázán návrh a konstrukce mikrovlnného optoelektronického přijímače s HBT zesilovačem, využívající induktivní kompenzaci frekvenční charakteristiky. Realizovaný projekt je založen na zkušenostech s návr- hem a konstrukcí hybridních optoelektronických přijímačů a implementací polymer- ních planárních vlnovodů na pracovištích ČVUT a VŠCHT v Praze.

Construction of a VHGT-Attached WDM-Type Triplex Transceiver Module Using Polymer PLC Hybrid Integration Technology

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The article report about design and construction of the bidirectional transceiver module for subscriber part of the passive optical network PON for a fiber to the home FTTH topology.

Design and Construction of a VHGT-Attached WDM -Type Triplex Transceiver Module Using Polymer PLC Hybrid Integration Technology

  • DOI: 10.1109/COMITE.2008.4569929
  • Odkaz: https://doi.org/10.1109/COMITE.2008.4569929
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about design and construction of the bidirectional transceiver TRx module for subscriber part of the passive optical network PON for a fiber to the home FTTH topology. The TRx module consists of a epoxy novolak resin polymer planar lightwave circuit (PLC) hybrid integration technology with volume holographic grating triplex filter VHGT, surface-illuminated photodetectors and spot-size converted Fabry-Pérot laser diode in SMD package. The hybrid PLC has composed from a two parts - polymer optical waveguide including VHGT filter section and a optoelectronic microwave section. The both parts are placed on the composite substrate.

Design and Construction of a VHGT-Attached WDM -Type Triplex Transceiver Module Using Polymer PLC Hybrid Integration Technology

  • DOI: 10.1117/12.818008
  • Odkaz: https://doi.org/10.1117/12.818008
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Paper report about design and construction of the bidirectional transceiver TRx module for subscriber part of the passive optical network PON for a fiber to the home FTTH topology. The TRx module consists of a epoxy novolak resin polymer planar lightwave circuit (PLC) hybrid integration technology with volume holographic grating triplex filter VHGT, surface-illuminated photodetectors and spot-size converted Fabry-Pérot laser diode in SMD package. The hybrid PLC has composed from a two parts - polymer optical waveguide including VHGT filter section and a optoelectronic microwave section. The both parts are placed on the composite substrate.

Epoxy Novlak Resin Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper report about optical properties of Epoxy Novolak Resin polymer used as optical waveguides.

Experimental Method for Verifying the Bistability and Theoretical Model of the Semiconductor Laser Diode Made by the Rate Equations

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper report about experimental method for verifying the bistability and theoretical model of the semiconductor laser diode made by the rate equations

Fabrications and Propreries of Multi-Mode Epoxy Novolak Resin Polymer Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about fabrication and properties of the Epoxy novolak resin optical waveguides. The waveguides were designed by using RSOFT software and by using modification dispersion equation. Planar polymer waveguides were fabricated by spin coating onto silica on silicon substrate while channel waveguides were formed by using standard photolithography. The polymer layers had waveguiding properties and the number of propagating modes varied from 1 to 10 depending on the thickness of the deposited layers. The best samples had optical losses 2.64 dB/cm at 650 nm and 0.42 dB/cm at 1550 nm.

Investigation of band gap of Dy doped GaN layers using the transmittance measurement

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about dysprosium doped gallium nitride layers fabricated by magnetron sputtering on silicon and corning glass substrate. Structure of the deposited layers was studied by the X-ray diffraction (XRD). Composition of the fabricated samples was checked by RTG spectrometer ARL 9400. Transmission spectra were measured by UV-VIS-NIR Spectrometer (UV 3600 Shimadzu) in spectral region from 280 nm to 1800 nm and the optical band gap Eg has been determined by the absorption coefficient values using Tauc's procedure, i.e. from the relationship αhv = K(hv − Eg)2. The optical band gap Eg of fabricated GaN layers without dysprosium doping was 2.91 eV. The optical band gap of dysprosium doped GaN layers varied from 2.93 eV to 3.52 eV depend on increasing of content of dysprosium ions.

Investigation Properties of GaN Layers Doped with Er3+ and Er3++Yb3+ Ions Using the Transmittance Measurement

  • DOI: 10.1117/12.818015
  • Odkaz: https://doi.org/10.1117/12.818015
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper report about fabrication and properties of Gallium Nitride (GaN) layers doped with erbium or mixture of erbium and ytterbium ions. Transmission spectra in the spectral range from 280 to 800 nm taken by the spectrometer Varian Cary 50 showed that the increasing concentration of the dopants shifts the absorption edge to the lower wavelengths. Optical band gap Eg was determined from the absorption coefficient values using Tauc's procedure and the obtained values varied from 3.08 eV to 3.89 eV depending on the erbium or erbium plus ytterbium doping. Photoluminescence emission at 1530 nm due to the Er3+ intra-4f 4I13/2 -> 4I15/2 transition was observed by using excitation of semiconductor lasers operating at 980 nm.

Optical Materials Doped with Rare Earth Ions

Optical Properties of Dy3+ Doped Epoxy Novolak Resin

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of epoxy novolak resin polymer doped with dysprosium ions. The polymer layers were fabricated by spin-coating onto silicon substrates, or pouring epoxy novolak resin solution into bottomless molds placed on a quartz substrate and leaving them to dry. Rather strong bands around 3366 cm-1 in the infrared spectra indicated presence of the O-H groups. Absorption measurements were done in the spectral range from 300 nm to 3000 nm. Optical band gap Eg was determined from the absorption coefficient values using Tauc's procedure, i.e., from the relationship αhv = A(hv - Eg)2 and the obtained values varied from 3.489 eV to 3.539 eV depending on the amount of dysprosium ions involved in the samples. Photoluminescence spectra around 1300 nm were investigated by using excitation of He-Ne laser operating at 632.8 nm and two semiconductor lasers operating at 980 nm and 827 nm.

Optical Properties of Dy3+ Doped Epoxy Novolak Resin

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., doc. Ing. Vítězslav Jeřábek, CSc., Hüttel, I., Lyutakov, O., Špirková, J., Machovič, V., Oswald, J., Zavadil, J.
  • Publikace: Proceedings of SPIE 7061 - Novel Optical Systems Design and Optimization XI. Bellingham (stát Washington): SPIE, 2008. p. 706119-1-706119-8. ISBN 978-0-8194-7281-6.
  • Rok: 2008
  • DOI: 10.1117/12.793788
  • Odkaz: https://doi.org/10.1117/12.793788
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of epoxy novolak resin polymer doped with dysprosium ions. The polymer layers were fabricated by spin-coated onto silicon substrates, or pouring epoxy novolak resin solution into bottomless molds placed on a quartz substrate and leaving them to dry. Infrared spectroscopy was used for investigation of O-H vibrations and we observed absorption band about 3390 cm-1 corresponds to these vibrations. Optical band gap Eg has been determined from the absorption coefficient values using Tauc's procedure, i.e. from the relationship αhv = A(hv − Eg)2. The optical band gap Eg varied from 3.489 eV to 3.539 eV depends on content of dysprosium ions. Photoluminescence spectra around 1300 nm were investigated by using excitation of He-Ne laser operating at 632.8 nm and two semiconductor lasers operating at 980 nm and 827 nm.

Optical Properties of PMMA Polymer Doped with Er3+ and Er3+/Yb3+ Ions

  • DOI: 10.1088/1742-6596/100/1/012021
  • Odkaz: https://doi.org/10.1088/1742-6596/100/1/012021
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report about fabrication and properties of polymethylmethacrylate doped with Er3+ and Yb3+ ions. The reported layers were fabricated by spin coating onto Si, Si/SiO2 or onto glass substrates. For the Er and Yb doping ErCl3 and YbCl3 or ErF3 and YbF3 powder dissolved in C5H9NO or C2H6OS were used. The research was focused on investigation of the influence of the amount of the dopants on the photoluminescence spectra at 1.55 μm. It was found that the increasing Er3+ content increased the intensity of the luminescence and that co-doping with ytterbium ions increased the intensity of the luminescence as well.

Properties of Erbium Doped Hydrogenated Amorphous Carbon Layers Fabricated by Sputtering and Plasma Assisted Chemical Vapor Deposition

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    We report about properties of carbon layers doped with Er3+ ions fabricated by Plasma Assisted Chemical Vapor Deposition (PACVD) and by sputtering on silicon or glass substrates. The structure of the samples was characterized by X-ray diffraction and their composition was determined by Rutherford Backscattering Spectroscopy and Elastic Recoil Detection Analysis. The Absorbance spectrum was taken in the spectral range from 400 nm to 600 nm. Photoluminescence spectra were obtained using two types of Ar laser (λex=514.5 nm, lex=488 nm) and also using a semiconductor laser (λex=980 nm). Samples fabricated by magnetron sputtering exhibited typical emission at 1530 nm when pumped at 514.5 nm.

Spectroscopic and photoluminescence study of epoxy novalak resin polymer doped with Er3+, Tm3+ and Er3+/Yb3+ ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    In this paper we report on the optical properties of epoxy novalak resin (ENR) doped with Er3+, Tm3+ ions and co-doped with Er3+/Yb3+ ions. Infrared spectroscopy was used for investigation of O-H vibrations and we observed absorption band about 3390 cm-1 corresponds to these vibrations. The absorbance measurement shoved five strong bands at 441 nm (4F3/2), 448 nm (4F5/5), 488 nm (4F7/2), 517 nm (2H11/2) and 539 nm (4S3/2) for the sample containing 10.0 at.% Er3+, while the typical absorption band occurred at 976 nm (2F5/2) for the sample containing 10.0 at.% Yb3+. The samples containing 20.0 at. % of Tm3+ ions had four absorption bands at 464 nm (1G4), 658 nm (3F2), 686 nm (3F3) and 1212 nm (3H5). Semiconductor laser excitation (λex= 980 nm) was used for photoluminescence measurement and the samples had typical 1530 nm emission due to 4I13/2 ... 4I15/2 Er3+ transition.

The hybrid photonic planar integrated receiver with a polymer optical waveguide

  • DOI: 10.1117/12.817997
  • Odkaz: https://doi.org/10.1117/12.817997
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    This article describes design of the photonic receiver composed of the system polymer planar waveguides, InGaAs p-i-n photodiode and integrated HBT amplifier on a low loss composite substrate. The photonic receiver was the main part of the hybrid integrated microwave optoelectronic transceiver TRx (transciever TRx) for the optical networks PON (passive optical networks) with FTTH (fiber-to-the-home) topology. In this article are presented the research results of three-dimensional field between output facet of a optical waveguide and p-i-n photodiode. In terms of our research, there was optimized the optical coupling among the facet waveguide and pi-n photodiode and the electrical coupling among p-i-n photodiode and input of HBT amplifier. The hybrid planar lightwave circuit (PLC) of the transceiver TRx will be composed from a two parts - polymer optical waveguide including VHGT filter section and a optoelectronic microwave section.

The Hybrid Photonics Integrated Circuits with the Polymer Optical Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper report about design of the hybrid photonics integrated circuits with the polymer optical waveguides.

Carbon Layers Doped with Erbium or Erbium and Ytterbium Ion

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Oswald, J., Peřina, V., Burian, Z., Zavadil, J.
  • Publikace: Proceedings of Workshop 2007. Praha: České vysoké učení technické v Praze, 2007. pp. 300-301. ISBN 978-80-01-03667-9.
  • Rok: 2007
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described carbon layers doped with erbium or erbium and ytterbium ion.

Gallium Nitride Layers Doped by Er3+ or Er3+ and Yb3+ by Ion Implantation

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Alves, E., Buchal, Ch., Špirková, J., Oswald, J., Peřina, V., Boldyryeva, H., Machovič, V., Burian, Z.
  • Publikace: Proceedings of Workshop 2007. Praha: České vysoké učení technické v Praze, 2007. pp. 304-305. ISBN 978-80-01-03667-9.
  • Rok: 2007
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of gallium nitride layers doped with Er3+ + Yb3+ by ion implantation

Hybridní fotonické integrované obvody s planárními polymerními optickými vlnovody

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Článek popisuje návrh fotonických integrovaných obvodů s polymerními optickými vlnovody.

Optical Properties of Epoxy Novolak Resin Polymer Co-doped with Er3+ and Er3+/Yb3+ Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of epoxy novolak resin polymer co-doped with Er3+ and Er3+/Yb3+ Ions.

Optical Properties of PMMA Co-doped with Er3+ and Er3+/Yb3+ ions

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Lutakov, O., Hüttel, I., Špirková, J.
  • Publikace: Documentation from the IVC-17/ICSS-13 and ICN+T2007 Congress. Stockholm: International Union for Vacuum Science, Technique and Applications, 2007.
  • Rok: 2007
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of PMMA co-doped with Er3+ and Er3+/Yb3+ ions

Optical Properties of PMMA Layers Prepared Under Applying Electric Field

  • Autoři: Lyutakov, O., doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Švorčík, V., Myslík, M., Siegel, J.
  • Publikace: Electronic Devices and Systems - IMAPS CS International Conference 2007. Brno: Vysoké učení technické v Brně, 2007. pp. 383-387. ISBN 978-80-214-3470-7.
  • Rok: 2007
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of PMMA layers prepared under applying electric field.

Optické vlastnosti vrstev GaN s dotací Er3+ + Yb3+ iontů

Photoluminescence of Er3+ and Er3+/Yb3+ Doped Epoxy Novolak Resin

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described photoluminescence of Er3+ and Er3+/Yb3+ doped epoxy novolak resin

Planar Lightwave Hybrid Integration Circuits

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper describes design of planar hybrid circuit based on planar lightwavw hybrid integration circuit.

Polymer Optical Planar Waveguides Doped by Erbium Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described polymer optical planar waveguides doped by erbium ions.

Properties of Er3+ and Dy3+ Implanted GaN Layers

Properties of Erbium and Ytterbium Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Burian, Z., Hüttel, I., Špirková, J., Hamáček, J., Oswald, J., Zavadil, J., Peřina, V.
  • Publikace: Acta Polytechnica. 2007, 46(6/2006), 49-55. ISSN 1210-2709.
  • Rok: 2007
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of erbium and ytterbium doped gallium nitride layers fabricated by magnetron sputtering.

Properties of the Epoxy Novolak Resin Optical Planar Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of the epoxy novolak resin optical planar waveguides.

The hybrid photonic integrated circuits with the polymer optical waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described designed of planar hybrid circuit with polymer optical waveguides.

Implantation of Er3+/Yb3+ Ions into GaN

Implantation of Er3+/Yb3+ Ions into GaN

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Špirková, J., doc. Ing. Vítězslav Jeřábek, CSc., Hüttel, I., Alves, E., Buchal, Ch., Oswald, J., Peřina, V., Boldyryeva, H., Zavadil, J.
  • Publikace: Proceedings of the WSEAS International Conference: 5th WSEAS Int.Conf. on MICROELECTRONICS, NANOELECTRONICS, OPTOELECTRONICS (MINO'06). Athens: WSEAS Press, 2006. p. 262-267. ISSN 1790-5117. ISBN 960-8457-42-4.
  • Rok: 2006

Modification of Refractive Index of Polymethylmethacrylate by Applying Electric Field

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Špirková, J., Myslík, M., Hlaváč, O., Lutakov, O., Burian, Z.
  • Publikace: Electronic Devices and Systems - IMAPS CS International Conference 2006. Brno: Vysoké učení technické v Brně, 2006. pp. 409-414. ISBN 80-214-3246-2.
  • Rok: 2006
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of PMMA layers prepared under applying electric field.

New Technologies for Passive and Active Planar Structures on Carbon Base and Organic Materials for Active Structures for Integrated Optics

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described new technologies for passive and active planar structures on carbon base and organic materials for active structures for integrated optics.

Optical Properties of Er3+ + Yb3+ Doped Gallium Nitride Layers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of gallium nitride layers doped with Er3+ + Yb3+ ions.

Optical Properties of Er3+ + Yb3+ Doped Gallium Nitride Layers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of Er3+ + Yb3+ doped gallium nitride layers.

Planar Lightwave Hybrid Integration Circuits

Planární fotonické hybridní integrované obvody

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Článek popisuje návrh fotonických integrovaných planárního hybridníh obvodů.

Polymethylmethacrylate Optical Planar Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described optical properties of polymethylmethacrylate optical planar waveguides.

Properties of Er3+ and Yb3+ Doped Gallium Nitride Layers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Alves, E., Buchal, Ch., Špirková, J., Oswald, J., Peřina, V., Boldyryeva, H., Zavadil, J., Burian, Z.
  • Publikace: MIPRO 2006, 29th International Convention. Chorvatsko: Mipro HU, 2006. p. 33-38. ISBN 953-233-018-6.
  • Rok: 2006
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of Er3+ and Yb3+ doped gallium nitride layers

Properties of Sputtered Carbon Layers Containing Erbium and Ytterbium Ions

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of sputtered carbon layers containing erbium and ytterbium ions.

Rare Earth Doped Gallium Nitride Layers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Alves, E., Buchal, Ch., Špirková, J., Oswald, J., Peřina, V., Boldyryeva, H., Machovič, V., Burian, Z.
  • Publikace: Proceedings of Workshop 2006. Praha: České vysoké učení technické v Praze, 2006. pp. 356-357. ISBN 80-01-03439-9.
  • Rok: 2006
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of rare earth doped gallium nitride layers

Rare Earth Doped Gallium Nitride Layers for Photonics Applications

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of rare earth doped gallium nitride layers for photonics applications

Vědecko-Výzkumná a Pedagogická Činnost v Oblasti Optoelektroniky

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Článek opisuje vědecko-Výzkumnou a Pedagogickou činnost v oblasti optoelektroniky

Gallium Nitride Thin Films Containing Rare Earth Ions Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Hamáček, J., Machovič, V., Oswald, J., Peřina, V., Havránek, V.
  • Publikace: nanoSmat2005 - International Conference on Surface, Coatings and Nanostuctured Materials. Aveiro: University of Aveiro, 2005. pp. P202-P204. ISBN 973-713-065-0.
  • Rok: 2005
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of gallium nitride thin films containing rare earth ions fabricated by magnetron sputtering.

Investigation of Properties of Rare Earth Doped Gallium Nitride Layers

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of GaN layers doped with rare earth ions

Measurement of Optical Losses in Gallium Nitride Layers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Skalský, M., Špirková, J., Stejskal, J., Drahoš, V., Burian, Z.
  • Publikace: Proceedings of Workshop 2005 - Part A,B. Praha: České vysoké učení technické v Praze, 2005. pp. 452-453. ISBN 80-01-03201-9.
  • Rok: 2005
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described measurement of optical losses in gallium nitride layers

Photoluminescence Study of (Er3+ + Yb3+) Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Oswald, J., Peřina, V., Zavadil, J., Machovič, V., Burian, Z.
  • Publikace: Infrared Photoelectronics. Bellingham: SPIE, 2005. p. 232-240. ISBN 0-8194-5964-X.
  • Rok: 2005

Photoluminescence Study of (Er3+ + Yb3+) Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Oswald, J., Peřina, V., Zavadil, J., Hamáček, J., Machovič, V., Havránek, V.
  • Publikace: International Congress on Optics and Optoelectronics. Warsaw: SPIE Europe, 2005. p. 153.
  • Rok: 2005

Polymer Optical Planar Waveguides Containing Erbium Ions

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Oswald, J., Prajer, M., Ondráčková, J.
  • Publikace: Proceedings of Workshop 2005 - Part A,B. Praha: České vysoké učení technické v Praze, 2005. pp. 450-451. ISBN 80-01-03201-9.
  • Rok: 2005
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described polymer optical planar waveguides containing erbium ions.

Rare Earth Doped Gallium Nitride Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Peřina, V., Macková, A., Hamáček, I.
  • Publikace: 15th Symposium on Applications of Plasma Processes, 3rd EU-Japan Joint Symposium on Plasma Processing. Bratislava: Comenius University, 2005. pp. 231-232. ISBN 80-223-2018-8.
  • Rok: 2005
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of rare earth doped gallium nitride fabricated by magnetron sputtering

Research of Technology Used for Fabrication of Active and Passive Waveguides on Semiconductor Base

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Oswald, J., Peřina, V., Hamíček, J., Machovič, V., Burian, Z.
  • Publikace: Proceedings of Workshop 2005 - Part A,B. Praha: České vysoké učení technické v Praze, 2005. pp. 448-449. ISBN 80-01-03201-9.
  • Rok: 2005
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described research of technology used for fabrication of active and passive waveguides on semiconductor base.

Carbon Planar Waveguides for Integrated Optics

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Schrofel, J., Machovič, V., Gurovič, J., Peřina, V.
  • Publikace: Proceedings of Workshop 2004. Praha: České vysoké učení technické v Praze, 2004. pp. 492-493. ISBN 80-01-02945-X.
  • Rok: 2004
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication and properties of carbon planar waveguides for integrated optics.

Characterization of Carbon Layer on Polyethyleneterephalate

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of carbon layer on polyethyleneterephalate substrate.

Doktorandské studium z pohledu studentů

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Čapek, P., Drahoš, V.
  • Publikace: 18th International Microworkshop 2004. Brno: VUT v Brně, 2004. pp. 143-147. ISBN 80-214-2818-X.
  • Rok: 2004

Er:GaN Thin Films Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Schrofel, J., Hüttel, I., Špirková, J., Peřina, V., Machovič, V.
  • Publikace: Thin Films 2004&Nanotech 2004. Singapore: Nanyang Technological University, 2004. pp. 34-OTF-A3.
  • Rok: 2004
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described Er:GaN thin films fabricated by magnetron sputtering.

Erbium Doped Gallium Nitride Thin Films

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Špirková, J., Schrofel, J., Peřina, V., Machovič, V.
  • Publikace: Proceedings of Workshop 2004. Praha: České vysoké učení technické v Praze, 2004. pp. 494-495. ISBN 80-01-02945-X.
  • Rok: 2004
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication and properties of erbium doped gallium nitride thin films.

Polymer Optical Planar Waveguides

  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication and properties of polymer optical planar waveguides.

Properties of RF magnetron sputtered gallium nitride semiconductors doped with erbium

  • Autoři: Peřina, V., doc. Ing. Václav Prajzler, Ph.D., Schrofel, J., Macková, A., Hnatowicz, V., Machovič, V., Matějka, P.
  • Publikace: Surface and Interface Analysis. 2004, 36(8), 952-954. ISSN 0142-2421.
  • Rok: 2004

Raman Spectra of Erbium Doped Gallium Nitride Layers Fabricated by Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Schrofel, J., Hüttel, I., Špirková, J., Machovič, V., Hamáček, J., Peřina, V.
  • Publikace: European Microelectronics and Packaging Symposium. Brno: VUT v Brně, FEI, 2004. pp. 577-582. ISBN 80-239-2835-X.
  • Rok: 2004
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described Raman spectra of erbium doped gallium nitride layers fabricated by magnetron sputtering.

Carbon Layers for Integrated Optics

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Schröfel, J., Gurovič, J., Nekvindová, P., Macková, A.
  • Publikace: Proceedings of SPIE Vol. 5036, Photonics Prague 2002, International Conference on Lasers, Applications, and Technologies: Advanced Lasers and Systems. Bellingham: SPIE, 2003. p. 342-347. ISSN 0277-786X. ISBN 0-8194-4837-0.
  • Rok: 2003

Erbium Doping into Thin Carbon Optical Layers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Schröfel, J., Hüttel, I., Nekvindová, P., Macková, A., Gurovič, J.
  • Publikace: Thin Solid Films. 2003, 433(32), 363-366. ISSN 0040-6090.
  • Rok: 2003

Fabrication Carbon Planar Waveguides

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Nekvindová, P., Schröfel, J., Gurovič, J., Macková, A.
  • Publikace: Proceedings of Workshop 2003. Praha: České vysoké učení technické v Praze, 2003. pp. 530-531. ISBN 80-01-02708-2.
  • Rok: 2003
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication process and properties of carbon optical planar waveguides.

Gallium nitride planar waveguides fabricated by magnetron sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Schröfel, J., Hüttel, I., Peřina, V., Špirková, J., Oswald, J.
  • Publikace: The Ninth Microoptics Conference. Tokyo: The University of Tokyo, 2003. pp. 148-151.
  • Rok: 2003
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication and properties of gallium nitride planar waveguides fabricated by magnetron sputtering.

Properties of erbium doped gallium nitride films prepared by magnetron sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Poster 2003. Praha: České vysoké učení technické v Praze, Fakulta elektrotechnická, 2003. p. N20. ISSN 0277-786X. ISBN 0-8194-5368-4.
  • Rok: 2003

Properties of Erbium-Doped Gallium Nitride Films Prepared by RF Magnetron Sputtering

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Hüttel, I., Schrofel, J., Špirková, J., Peřina, V., Machovič, V., Oswald, J., Studnička, V., Novotná, M.
  • Publikace: Microwave and Optical Technology 2003. Washington: SPIE, 2003. p. 294-297. ISSN 0277-786X. ISBN 0-8194-5368-4.
  • Rok: 2003
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described properties of erbium-doped gallium nitride films prepared by RF magnetron sputtering.

Carbon Layers for Integrated Optics

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Schröfel, J., Nekvindová, P., Gurovič, J., Macková, A.
  • Publikace: Photonics Prague 2002. Praha: TECH-MARKET, 2002. pp. 121. ISBN 80-86114-46-5.
  • Rok: 2002
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described fabrication and properties of carbon layers for integrated optics.

Characterisation of hydrogen and Erbium in carbon Layers fabricated by PACVD for optical aplications

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Macková, A., Peřina, V., Hnátowitz, V., Nekvindová, P., Huttel, I., Špirková, J.
  • Publikace: Nuclear Instruments and Methods in Physics Research, Section B, Beam Interactions with Materials and Atoms. 2002, 188(1-4), 112-114. ISSN 0168-583X.
  • Rok: 2002

Characterisation of hydrogen and erbium in carbon layers fabricated by PACVD for optical applications

  • Autoři: Mackova, A., Perina, V., Hnatowicz, V., Nekvindova, P., doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Spirkova, J.
  • Publikace: Nuclear Instruments and Methods in Physics Research, Section B, Beam Interactions with Materials and Atoms. 2002, 188(1), 112-114. ISSN 0168-583X.
  • Rok: 2002
  • DOI: 10.1016/S0168-583X(01)01036-9
  • Odkaz: https://doi.org/10.1016/S0168-583X(01)01036-9
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Carbon films prepared by plasma assisted chemical vapor deposition were doped by laser active ion Er3+. The characterisation of the layers was performed using Rutherford back scattering spectrometry and elastic recoil detection analysis. Optical properties of the waveguides were measured at 660 run wave length using standard prism spectroscopy. The correlation between the layer composition and the content of incorporated erbium and layer optical properties shows very interesting aspects

Erbium Doping into Thin Carbon Optical Layers

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Nekvindová, P., Schröfel, J., Macková, A., Gurovič, J.
  • Publikace: ICTF 12 - Book of Abstracts. Bratislava: Slovak Academy of Sciences, Institute of Informatics, 2002. pp. 255. ISBN 80-224-0737-2.
  • Rok: 2002

Planární uhlíkové vlnovody dotované erbiem

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Nekvindová, P., Schröfel, J., Gurovič, J., Macková, A.
  • Publikace: Optické komunikace O.K. 2002. Praha: TECH-MARKET, 2002. p. 131-135. ISBN 80-86114-48-1.
  • Rok: 2002
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Článek popisuje vlastnosti planárních uhlíkových vlnovodů s dotací erbia.

Thin Carbon Films for Passive and Active Optical Waveguides

  • Autoři: doc. Ing. Václav Prajzler, Ph.D., Huttel, I., Nekvindová, P., Schröfel, J., Gurovič, J., Macková, A.
  • Publikace: Proceedings of Workshop 2002. Praha: České vysoké učení technické v Praze, 2002. pp. 534-535. ISBN 80-01-02511-X.
  • Rok: 2002
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    The paper described thin carbon films for passive and active optical waveguides.

Passive and Active Carbon and Carbon Nitride Optical Waveguides

  • Autoři: Huttel, I., Nekvindová, P., Schröfel, J., Černý, F., Gurovič, J., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Book of Abstracts of the Conference MADICA 2001. Monastir: Faculte des Sciences de Monastir, 2001. pp. 93.
  • Rok: 2001

Thin carbon and carbon nitride films for passive and active optical waveguides

  • Autoři: Hüttel, I., Schröfel, J., Nekvidová, P., Černý, F., Gurovič, J., doc. Ing. Václav Prajzler, Ph.D., Macková, A.
  • Publikace: Combinational and Composition Spread Techniques in Materials and Device Developement II. Washington: The International Society for Optical Engineering, 2001. p. 114-121. ISSN 0277-786X. ISBN 0-8194-3959-2.
  • Rok: 2001
  • DOI: 10.1117/12.424749
  • Odkaz: https://doi.org/10.1117/12.424749
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Thin carbon and carbone nitride films exhibit specific optical and machanical properties which make them promissing materials for integrated optics. The fabrication of carbon and carbonn nitride layers for planar optical waveguides is focused on two areas. The first one is the growth of carbone or carbone nitride layers with reproducible refractive index and thickness for passive waveguides, and teh second one is the growth of these layers and their doping with erbium for active waveguides.

Thin Carbon and Carbon Nitride Films for Passive and Active Optical Waveguides

  • Autoři: Huttel, I., Nekvindová, P., Schröfel, J., Černý, F., Gurovič, J., doc. Ing. Václav Prajzler, Ph.D., Macková, A.
  • Publikace: Proceedings of SPIE. 2001, 4281(2), 114-121. ISSN 0277-786X.
  • Rok: 2001

Uhlíkové vrstvy pro pasivní a aktivní planární optické vlnovody

  • Autoři: Hüttel, I., doc. Ing. Václav Prajzler, Ph.D., Nekvidová, P., Schröfel, J., Gurovič, J., Černý, F., Macková, A.
  • Publikace: Optické komunikace 2001. Praha: TECH-MARKET, 2001. pp. 86-90. ISBN 80-86114-42-2.
  • Rok: 2001
  • Pracoviště: Katedra mikroelektroniky
  • Anotace:
    Tenké vrstvy uhlíku a nitridu uhlíku mají dobré optické a mechnické vlastnosti vhodné pro integrovanou optiku. Pro tento účel byl prováděn výzkum přípravy optických vrstev, které byly nanášené na křemíkový subtrát. Příspěvvek pojednává o studiu a přípravě planárních optických vlnovodů na Si, nanášených metodou PACVD.

Uhlíkové vrstvy pro pasivní a aktivní planární optické vlnovody

  • Autoři: Huttel, I., Schröfel, J., Nekvindová, P., Gurovič, J., Černý, F., doc. Ing. Václav Prajzler, Ph.D.,
  • Publikace: Optické komunikace 2001. Praha: TECH-MARKET, 2001. pp. 86-90. ISBN 80-86114-42-2.
  • Rok: 2001

Za stránku zodpovídá: Ing. Mgr. Radovan Suk