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Wyszukujesz frazę "Woliński, T. R." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    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
    Tytuł:
    Numerical Simulations of Electrically Induced Birefringence in Photonic Liquid Crystal Fibers
    Autorzy:
    Ertman, S.
    Woliński, T.
    Beeckman, J.
    Neyts, K.
    Vanbrabant, P.
    James, R.
    Fernández, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506745.pdf
    Data publikacji:
    2010-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.Gs
    78.20.Bh
    42.79.Kr
    Opis:
    It has been recently experimentally demonstrated that propagation and polarization properties of the photonic liquid crystal fibers can be effectively tuned with the electric field. In particular, effective electric tuning of the phase birefringence has been obtained in the photonic liquid crystal fibers based on the high index glasses. Accurate numerical simulations of the impact of electric field on the guiding properties of the photonic liquid crystal fibers require complex methods, in which all important physical properties of the liquid crystal are taken into account (optical anisotropy, molecular orientation and relatively high losses). In this paper we present two different numerical approaches based on the finite element method. First one utilizes the simplified assumption of the "collective tilt" of molecules, and gives rough estimation of the phase birefringence tuning range. The second approach is much more rigorous, since electrically induced reorientation of the liquid crystal is calculated with a Q-tensor method giving the values of the inhomogeneous permittivity tensor. The value of the electrically induced birefringence calculated with the second method is in a good agreement with the experimental results.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 6; 1113-1117
    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:
    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:
    Influence of Angular Orientation of the Embedded Highly Birefringent Fiber on PMD Changes under Axial Stress
    Autorzy:
    Budaszewski, D.
    Lesiak, P.
    Plaga, R.
    Rajan, G.
    Semenova, Y.
    Farrell, G.
    Boczkowska, A.
    Domański, A.
    Woliński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493020.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.Gs
    42.81.Pa
    62.23.Pq
    Opis:
    In the paper we present results of the research on polarization mode dispersion changes inside the polarimetric optical fiber sensors based on highly birefringent optical fibers embedded into composite materials with different angular orientations of the optical axes. Based on measurements made for different types of highly birefringent optical fiber sensors we have shown that strain sensitivities after lamination process are different in comparison to the data obtained before lamination. Our results indicate that polarization mode dispersion in side-hole highly birefringent fibers under axial stress strongly depends on fiber orientation in the composite material suggesting that orientation of the polarization axes of the highly birefringent fiber can be responsible for behavior of the fiber inside the composite material.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 575-578
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photonic Liquid Crystal Fibers with Polymers
    Autorzy:
    Woliński, T.
    Tefelska, M.
    Mileńko, K.
    Siarkowska, A.
    Budaszewski, D.
    Domański, A.
    Ertman, S.
    Orzechowski, K.
    Rutkowska, K.
    Sierakowski, M.
    Nowinowski-Kruszelnicki, E.
    Dąbrowski, R.
    Mergo, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399416.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.Df
    42.81.Wg
    02.60.Cb
    42.70.Qs
    Opis:
    Photonic liquid crystal fibers with polymers constitute a new solution based on liquid crystals and microstructured polymer optical fibers opening up new areas in innovative sensing and photonic devices applications. Compared with their silica-based microstructured fibers, it is easier to fabricate exotic microstructured polymer optical fibers by extrusion or drilling at low temperature; their nonlinearity is potentially stronger, the range of available polymers that may be drawn is more diverse and the biocompatibility of polymers is often better. Liquid crystals due to their attractive properties i.e., the high birefringence, high electro-optic and thermo-optic effects are a very good candidate for microstructured polymer optical fiber infiltration to obtain tunable all-in-fiber innovative photonic devices. The paper will discuss basic properties and possible applications of the polymer photonic liquid crystal fibers that will arise from their high optical tunability with external and internal factors. Current research effort is directed towards two main solutions: photonic crystal fibers and microstructured polymer optical fiber-based structures, both infiltrated with liquid crystals of tailored optical properties.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 613-616
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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