Highly birefringent holey fibers with zero polarimetric sensitivity to temperature

We investigated theoretically and experimentally the polarimetric sensitivity to temperature of highly birefringent photonic crystal fibers (HB PCFs) in which the birefringence is induced by two large holes adjacent to the core. We carried out the sensitivity measurements in a broad spectral range (680-1550 nm) using a spectral domain interferometric method for two fibers with different pitch distance and hole diameter. Our results show that the polarimetric sensitivity to temperature in the investigated fibers is highly dispersive and crosses zero at specific wavelengths. Furthermore, we found good agreement between the measured and the calculated characteristics.