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ABSTRACT: In the paper we analyze microstructured optical fibers filled with typical nematic liquid crystals, i.e., 5CB and 6CHBT under
influence of external electric field or temperature. We use the modified Mueller matrix method with an additional depolarization
matrix to calculate degree of polarization changes of the light propagating in the liquid-crystal infiltrated microstructured
optical fibers. Preliminary experimental results of light depolarization measurements during propagation in these microstructured
fibers are also presented.
Opto-Electronics Review 04/2012; 17(2):156-160. · 0.97 Impact Factor
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ABSTRACT: The paper reviews and discusses the latest developments in the field of the photonic liquid crystal fibers that have occurred
for the last three years in view of new challenges for both fiber optics and liquid crystal photonics. In particular, we present
the latest experimental results on electrically induced birefringence in photonic liquid crystal fibers and discuss possibilities
and directions of future developments.
Opto-Electronics Review 04/2012; 14(4):329-334. · 0.97 Impact Factor
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T.R. Woliński,
K.A. Rutkowska,
S. Ertman,
D. Budaszewski,
M. Chychłowski,
A. Czapla, A.W. Domański,
Ł. Garncarek,
K. Mileńko,
M. Sierakowski,
M. Tefelska,
R. Da̧browski,
E. Nowinowski-Kruszelnicki,
J. Wójcik
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ABSTRACT: Photonic Liquid Crystal Fibers are advanced structures that benefit from a mergence of "passive" photonic crystal fiber host microstructures with "active" liquid crystal guest materials. Such a combination allows for a diversity of novel and uncommon spectral and polarization properties. The latter has simultaneously reinvigorated research in both fields of Fiber Optics and Liquid Crystals Photonics by demonstrating that such optical fibers can be more "special" and unique than previously thought. Importantly, a proper choice of Photonic Liquid Crystal Fibers components, together with precise adjustment of their parameters, may result in various new high-tech photonic elements for different applications. In this letter novel developments of highly tunable photonic devices based on Photonic Liquid Crystal Fibers, obtained recently at the Warsaw University of Technology, are demonstrated.
Photonics Global Conference (PGC), 2010; 01/2011
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ABSTRACT: Polarimetric optical fiber sensors based on highly birefringent (HB) polarization-maintaining fibers have focused great interest for last decades. The paper presents a novel modular fiber optic sensing system of potential industrial applications to measure temperature, hydrostatic pressure, and strain that is based on classical HB and photonic crystal fibers and can operate at visible and infrared wavelengths. The main idea of the system is a novel and replaceable fiber-optic head, which allows adjusting the measuring system both to the required range and type (strain, pressure or temperature) of the external measurand. We propose also a new configuration of the fiber optic strain gauge with a free cylinder and an all-fiber built-in analyzer based on the photonic crystal fiber filled with a liquid crystal. Additionally, strain sensitivities of various HB fibers operating at visible and infrared wavelengths range have been measured.
Bulletin of the Polish Academy of Sciences, Technical Sciences 01/2008; 56. · 0.97 Impact Factor
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ABSTRACT: In the paper we present results of analysis of partially coherent light depolarization in two types of liquid crystals possessing
linear birefringence controlled by temperature and external electric field changes. Some experimental results of degree of
polarization measurements for different light sources as a superluminescent diode and a laser diode are also presented.
Opto-Electronics Review 11/2006; 14(4):305-310. · 0.97 Impact Factor
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ABSTRACT: We present preliminary results of the tests performed by using a modular fiber-optic sensor for hydrostatic pressure/temperature and also rotation measurements envisaged for refinery applications. Our prototype fiber optic sensor for rotation measurements has been successfully installed and tested in the ORLEN Refinery in Plock, Poland. During the initial tests, we used rotating machine to measure its rotor velocity. As a light source we used a pigtailed laser diode (λ=635 nm) whereas the sensor head was connected to the light source and to a detector by a 100-meters-long loop of the multimode optical fibers. The output characteristics of the modular sensing system have been optimized in view of enhancing their measurement capabilities and in order to minimize disturbing environmental effects.
