Abstract
The drift of birefringence difference can be caused by the ambient temperature variety of the fiber, which will lead to the change of lightwave polarization mode in the fiber. In the resonator fiber optic gyro systems, the change of lightwave polarization mode of the light transmission in the fiber can bring about the measurement error of the system. The hollowcore photonic crystal fiber (HCPCF) resonator is designed to reduce the drift of birefringence difference caused by the temperature variety. It is verified experimentally that the temperature coefficient of the HCPCF birefringence difference is decreased about two orders of magnitude which is lower than that of the normal polarization maintaining fiber (PMF).
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