Speciality Optical Fibers

With the invention of photonic crystal fibres (PCFs, or also denoted as microstructured optical fibres, MOFs) in 1996, a new field of research opened for optical fibres as for telecommunications (wavelengths 1260 – 1620 nm) the conventional silica single-mode fibre was already a mastered technology. PCFs allow vast opportunities of parameter design by modification of their inner air-hole structure, such as the chromatic dispersion, attenuation, single-mode regime, nonlinearity and many more. Furthermore, with the advances in glass processing, non-silica glasses (fluoride, lead-silicate, chalcogenide, etc.) can be exploited to move deeper into the near and mid-infrared region. In the past few years, hollow-core fibres, as the masterpiece of PCFs, have been prepared with reasonably low attenuation enabling cutting-edge applications.

At the moment the research of our team is mainly focused on hollow-core photonic bandgap fibres (HC-PBGFs) and anti-resonant fibres (ARFs), where both fibre types guide light in a hollow air-core. Hollow-core fibres offer many advantages over conventional solid-core fibres due to the strongly reduced interaction of the guided light with the glass material. Examples of such benefits are the extremely low fibre non-linearity, low and stable signal latency, the possibility to construct long-length gas cells.

We concentrate on the efficient light coupling from standard solid-core fibres into hollow-core fibres. We have designed and developed the interconnection using a world-unique approach. We propose anti-reflective or highly reflective layers with respect to state-of-the-art research applications. All this is made on an international level in cooperation with one of the world-leading institutes in PCFs, the University of Southampton.

Our background includes experience with PCF characterization, fibre tapering for sensor purposes, rare-earth doped amplifiers and lasers. Furthermore, we have a brand new glass fusion station, the top-shelf Fujikura/AFL LZM-100 giving us countless possibilities of research extensions.

Výzkumné skupiny

Bezdrátová a vláknová optika

Výzkumný tým se zabývá vláknovou optikou, optickou detekcí, vláknovými lasery, šířením optických svazků v zástavbě i uvnitř budov a vlivem atmosféry na bezdrátové optické spoje (free-space optics, FSO) a v neposlední řadě i komunikací ve viditelném světle - visible-light communication (VLC). V současné době je vědecká činnost týmu zaměřena jak na základní výzkum, tak i na spolupráci s průmyslem v oblasti aplikovaného výzkumu a experimentálního vývoje.

Za stránku zodpovídá: Ing. Mgr. Radovan Suk