Measurements of sensitivity to hydrostatic pressure and temperature in highly birefringent photonic crystal fibers |
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| Authors: | Tadeusz Martynkien Marcin Szpulak Gabriela Statkiewicz Grzegorz Golojuch Jacek Olszewski Waclaw Urbanczyk Jan Wojcik Pawel Mergo Mariusz Makara Tomasz Nasilowski Francis Berghmans Hugo Thienpont |
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| Institution: | (1) Institute of Physics, Wroclaw University of Technology, Wyb. Wyspianskiego 27, 50-370 Wroclaw, Poland;(2) Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;(3) Laboratory of Optical Fiber Technology, Maria Curie-Skłodowska University, Pl. M. Curie-Sklodowskiej 3, 20-031 Lublin, Poland;(4) SCK·CEN, Boeretang, Mol 2400, Belgium |
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| Abstract: | We report on experimental studies of polarimetric sensitivity to hydrostatic pressure and temperature in two highly birefringent
index guided photonic crystal fibers, in which birefringence is induced by one row of the cladding holes with diameters smaller
than the other cladding holes. The sensitivity measurements were carried out in the spectral range from 0.6 μm to 1.6 μm.
Our results show that absolute value of the polarimetric sensitivity to hydrostatic pressure can reach 23 rad/MPa × m, which
is almost one order of magnitude higher than in conventional fibers with elliptical core. Simultaneously, polarimetric sensitivity
to temperature is at least two orders of magnitude lower than in conventional highly birefringent fibers. Moreover, we proved
experimentally that one of the investigated fibers is completely insensitive to temperature at certain wavelength. |
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| Keywords: | Photonic crystal fibers Birefringence Temperature Hydrostatic pressure Optical fiber sensor |
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