We measured the spectral dependence of the polarimetric sensitivity to temperature in three HB PCFs of different construction. The birefringence in the investigated fibers is induced respectively by elliptical shape of the core, by a pair of large cladding holes adjacent to the core or by one row of the cladding holes with diameters smaller than the other cladding holes. Our results show that the temperature sensitivity in the birefringent PCFs can vary in the range from 0 to 0.1 rad/K×m, is highly dispersive, and highly dependent upon fiber geometry. We also demonstrate that for one of the investigated fibers, the temperature sensitivity changes its sign at λ=1.44 μm, which makes this fiber completely insensitive to temperature at this wavelength
© 2006 Institute of Electronics, Information and Communication Engineers
T. Martynkien, G. Statkiewicz, M. Szpulak, J. Olszewski, W. Urbanczyk, J. Wojcik, P. Mergo, M. Makara, T. Nasilowski, F. Berghmans, and H. Thienpont, "Measurements of Temperature Sensitivity in Index-Guided Highly Birefringent Photonic Crystal Fibres," in Optical Fiber Sensors, OSA Technical Digest (CD) (Optical Society of America, 2006), paper ThE65.