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Wyświetlanie 1-15 z 26
Tytuł:
Polarization in Optical Fibers
Autorzy:
Woliński, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/2008216.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.-i
Opis:
Physical origin of polarization phenomena in highly birefringent optical fibers including nonlinear optical effects is discussed and their impact on applications to polarimetric optical fibers sensors is underlined.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 749-760
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Beam Propagation Method for Liquid Crystal-Core Optical Fiber Waveguides
Autorzy:
Szymańska, A.
Woliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/2008241.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Df
42.81.Qb
42.81.Dp
Opis:
Propagation effects in liquid crystal-core optical fiber waveguides were investigated and simulated by means of beam propagation method. Spatial propagation beam distribution for anisotropic liquid crystal fibers was defined by using BPM_CAD software package (courtesy of Optiwave Corporation). The field intensity was related to the refractive index of core at the liquid crystal fiber in two different waveguide configurations: planar and radial, whereas the number of the propagating modes was calculated. Numerical results were compared with some experimental data formerly obtained.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 761-766
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light Modulation in Elliptical-Core Liquid Crystal Fibers
Autorzy:
Nasiłowski, T.
Woliński, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/2008248.pdf
Data publikacji:
1999-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.-i
Opis:
An original idea of external parameters (electric field, temperature, pressure etc.) monitoring is presented. After the theoretical analysis of the light modulation in a liquid crystal and elliptical-core anisotropic fiber the latest experimental results are reported. Due to measurands-induced changes in birefringence and propagation conditions the liquid crystal and elliptical-core fiber uniting unique advantages of liquid crystals and quality of fiber technology acts as a sensing medium and can be used for continuous monitoring of different external parameters.
Źródło:
Acta Physica Polonica A; 1999, 95, 5; 767-775
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light Propagation in Liquid Crystal Fiber Structures
Autorzy:
Nasiłowski, T.
Woliński, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/2023819.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.79.Hp
42.70.Df
42.81.Qb
Opis:
The paper analyzes the light propagation in anisotropic liquid crystal fiber structures in order to find the possibilities to apply them to control and switch the polarization state and modulate some parameters of the transmitted light. The long term goal and motivation of the authors was the suggestion to replace the light modulating liquid crystal cell by a new generation of liquid crystal waveguides as an all-fiber light modulator, as well as sensors for different environmental parameters.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 193-200
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polarization Properties of Liquid-Crystal Elliptical-Core Fibers
Autorzy:
Szymańska, A.
Woliński, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/2023965.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Df
42.81.Qb
42.81.Dp
Opis:
Polarization properties of liquid-crystal core optical fibers have been investigated. The liquid-crystal fiber is characterized by elliptical anisotropic core with low birefringence liquid crystal introduced by capillary axis. The paper presents also initial experimental results of the liquid-crystal fiber in the polarimetric configuration subjected to the influence of selected perturbations.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 201-205
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and Experimental Analysis of Photonic Crystal Fiber Selectively Infiltrated with Silicon Oil
Autorzy:
Mileńko, K.
Rutkowska, K.
Woliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1399409.pdf
Data publikacji:
2013-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.-i
42.70.Qs
42.81.Pa
Opis:
In this paper we demonstrate the numerical and experimental investigation of the photonic crystal fiber selectively infiltrated with polymer material, that is a silicon oil DC-704. The results are compared with those obtained for fully infiltrated fiber. The influence of the infiltration on light propagation properties, as well as on temperature sensitivity of the fiber are also presented. The infiltration causes the formation of photonic bandgap effect, and in the case of full infiltration the bandgaps shift equal to 50 nm is observed due to the change in external temperature in the range of about 40C (i.e. from 24 to 61°C).
Źródło:
Acta Physica Polonica A; 2013, 124, 3; 589-591
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polarization Mode Dispersion in Birefringent Optical Fibers
Autorzy:
Woliński, T. R.
Domański, A. W.
Powiązania:
https://bibliotekanauki.pl/articles/2035695.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Gs
42.81.Pa
42.25.Ja
42.25.Dd
Opis:
The paper discusses influence of polarization mode dispersion on performance of polarimetric systems with highly birefringent fibers. It appeared that polarization mode dispersion strongly influences a degree of polarization that depends on coherence of the light source used and simultaneously diminishes dynamics of the output signal.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 211-219
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hollow-Core Bragg Fiber for Bio-Sensing Applications
Autorzy:
Mileńko, K.
Hu, D.
Shum, P.
Woliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1506806.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.85.fk
42.81.Pa
42.81.-i
42.79.Dj
Opis:
Theoretical analysis of propagation properties in a hollow-core Bragg fiber for bio-sensing applications has been demonstrated. Based on the Bragg fiber we propose a resonant sensor that operates on changes in refractive index of aqueous solution placed inside the hollow core. By using the transfer matrix method we analyzed the confinement loss of the $TE_{01}$ mode in the hollow-core Bragg fiber. We have shown the influence of the fiber geometry on the changes in the confinement loss. Spectral sensitivity and resolution of the sensor are also presented.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1205-1208
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Longitudinal Strain Induced Birefringence in Highly Birefringent Fiber for Dynamic Compensation of Polarization Mode Dispersion
Autorzy:
Domański, A. W.
Lesiak, P.
Woliński, T. R.
Powiązania:
https://bibliotekanauki.pl/articles/2035697.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Gs
42.81.Pa
42.25.Ja
42.25.Dd
Opis:
The paper addresses a compensation method of polarization mode dispersion based on longitudinal strain applied to a highly birefringent fiber introduced as apart from optical fiber link. As an introduction a short overview of the polarization mode dispersion compensation methods known up-to-now is done. Dependence of polarization mode dispersion on longitudinal strain is discussed. Some results of experiment with birefringence changes due to longitudinal strain in the bow-tie highly birefringent fiber necessary for dynamic polarization mode dispersion are presented.
Źródło:
Acta Physica Polonica A; 2003, 103, 2-3; 221-227
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards tuning of thermal sensitivity of the long period fiber gratings using a liquid crystal layer
Autorzy:
Czapla, A.
Bock, W.
Mikulic, P.
Woliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/200642.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
long period fiber grating
liquid crystal
sensors
Opis:
A high-efficiency thermal tuning filter based on a long-period fiber grating (LPFG) combined with a low-birefringence liquid crystal (LB LC) cladding layer is presented. Two types of LPFGs were studied and compared: the LPFGs based on a standard telecommunication fiber produced by an electric arc technique, and the LPFGs based on a boron co-doped fiber written by a UV technique. Both types of LPFGs when enhanced with an external LB LC layer exhibit two different temperature sensitivities, which depend on the temperature range of operation. For the LPFGs based on standard telecommunication fiber we can conclude that the presence of the LB LC cladding increases the thermal tuning efficiency by more than one order of magnitude over the value for the LPFGs in air. In the case of the LPFGs based on the boron co-doped fiber we discovered it is possible to obtain either a temperature-independent attenuation band or the attenuation bands with high temperature sensitivities, just by careful choice of the order of the cladding mode and the operating wavelength.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 4; 503-508
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Electrically Tunable Long-Period Fiber Grating Using a Liquid Crystal Cladding Layer
Autorzy:
Czapla, A.
Woliński, T.
Nowinowski-Kruszelnicki, E.
Bock, W.
Powiązania:
https://bibliotekanauki.pl/articles/1506728.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Cn
42.79.Dj
42.81.Pa
42.79.Kr
Opis:
The main aim of the presented work is the integration of a long-period fiber grating and a liquid crystal into a hybrid structure, in order to develop an innovative fiber optic device controlled by an external electric field. The studied long-period fiber grating was fabricated using UV irradiation in a boron co-doped fiber (PS1250/1500, manufactured by Fibercore). As a liquid crystal we used a typical 5CB nematic liquid crystal. The sensing mechanism of the proposed loss filter relies on long-period fiber grating attenuation bands sensitivity to optical properties of the liquid crystal layer. The results obtained show that the long-period fiber grating with a nanosized liquid crystal layer exhibits one order of magnitude higher electrical sensitivity and a lower level of the voltage control than the long-period fiber grating with a micro-sized liquid crystal layer.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1104-1107
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Different Liquid Crystal Materials under Planar and Homeotropic Boundary Conditions in Capillaries
Autorzy:
Chychłowski, M.
Ertman, S.
Nowinowski-Kruszelnicki, E.
Dąbrowski, R.
Woliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/1493035.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.70.Df
61.30.Jf
77.84.Nh
42.79.Kr
Opis:
We present a thermally-induced liquid crystal orientation method by applying an extra orienting layer onto an inner capillary surface that can induce either planar or homeotropic liquid crystal boundary conditions. Experimental evidence of boundary-induced orientation in two types of liquid crystal (nematic, chiral nematic) in a capillary are shown.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 582-584
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polarimetric Fiber Optic System for Static and Dynamic Strain Measurement
Autorzy:
Konopka, W.
Woliński, T. R.
Domański, A. W.
Karpierz, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/2023977.pdf
Data publikacji:
2001-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Gs
42.81.Pa
Opis:
Polarization properties of the transmitted optical signal in polarimetric fiber-optic sensing systems for dynamic strain measurements as well as for smart structures applications are presented. The smart structure consists of highly birefringent fiber embedded in an epoxy cylinder.
Źródło:
Acta Physica Polonica A; 2001, 99, 1; 207-212
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral Tuning of the Long-Period Fiber Gratings by Using Low Birefringence Liquid Crystals
Autorzy:
Czapla, A.
Bock, W.
Woliński, T.
Dąbrowski, R.
Nowinowski-Kruszelnicki, E.
Powiązania:
https://bibliotekanauki.pl/articles/1493037.pdf
Data publikacji:
2011-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Cn
42.79.Dj
42.81.Pa
42.79.Kr
Opis:
The work presented in this paper is focused on investigation of the spectral properties of the long-period fiber gratings combined with the liquid crystals, named liquid crystal long-period fiber gratings. The experiments carried out showed that the proposed designs of the liquid crystal long-period fiber gratings can offer very interesting spectral properties and can introduce a new level of sensitivity. In particular, a high-efficiency thermal tuning of the long-period fiber gratings coated with low-birefringence liquid crystal layers could be achieved and gave rise to a fast and wide switching ability of the attenuation bands within their transmission spectrum.
Źródło:
Acta Physica Polonica A; 2011, 120, 4; 589-592
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Propagation Effects in Photonic Liquid Crystal Fibers with a Complex Structure
Autorzy:
Tefelska, M.
Chychłowski, M.
Woliński, T.
Dąbrowski, R.
Rejmer, W.
Wójcik, J.
Powiązania:
https://bibliotekanauki.pl/articles/1506868.pdf
Data publikacji:
2010-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.81.Gs
78.20.Bh
42.79.Kr
Opis:
Chiral nematic liquid crystals are very interesting materials to infiltrate photonic crystal fibers since they are characterized by unique optical properties such as selective Bragg reflection, circular dichroism, and optical activity. In this paper the latest experimental results of the photonic crystal fibers filled with new chiral nematic liquid crystals are presented. Spectral properties of the light propagating in the photonic liquid crystal fibers have been measured and analyzed.
Źródło:
Acta Physica Polonica A; 2010, 118, 6; 1259-1261
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 26

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