Hybrid air-core photonic bandgap fiber ring resonator and implications for resonant fiber optic gyro by Yuchao Yan, Linglan Wang, Huilian Ma, Diqing Ying, Zhonghe Jin.
A novel hybrid polarization-maintaining (PM) air-core photonic bandgap fiber (PBF) ring resonator is demonstrated by using a conventional PM coupler formed splicing section of PBF into the resonator. The coupling loss between and solid-core reduced down to ∼1.8 dB per junction. With countermeasures proposed reduce backscattering induced noise, bias stability approximately 0.007 °/s was observed over 1 hour timeframe, which best result reported date, our knowledge, for RFOGs equipped with