Abstract
A fiber ring resonator (FRR) constructed using a Panda polarization-maintaining fiber does not effectively solve the problem of temperature-related polarization fluctuation, which considerably limits the detection accuracy of the resonant fiber optic gyro. The polarization-maintaining photonic crystal fiber (PM-PCF) can improve the thermal stability of the FRR. In this study, a structure that can simultaneously detect the polarization fluctuation of two FRRs is designed. We analyzed and verified the polarization phase shift errors of these two types of fibers, which are caused by the thermally induced birefringence changes. Theoretical simulation and experimental results confirm that a PM-PCF can be used to optimize the FRR, which can effectively suppress the polarization fluctuation.
Highlights
A gyro is an inertial sensor to measure the rotation rate [1]
The birefringent temperature coefficients of the two types of fibers were calculated and compared with the experimental results. Both the theoretical simulation and the experimental results confirmed that a polarization-maintaining photonic crystal fiber (PM-photonic crystal fiber (PCF)) can be used to optimize an fiber ring resonator (FRR), which can effectively suppress the polarization fluctuation
The polarization depicts the resonant curves of two FRRs at approximately 25 °C
Summary
A gyro is an inertial sensor to measure the rotation rate [1]. A resonant fiber optic gyro (RFOG). Common PMFs, such as the Panda-PMF, exhibit two circular stress applying parts (SAPs) on both sides of their core, thereby increasing the birefringence of the fiber This makes the propagation constants of the two ESOPs markedly different, and coupling does not readily occur, maintaining the polarization. An FRR constructed using a Panda-PMF does not effectively solve the problem of temperature instability, which introduces severe polarization crosstalk and considerably limits the detection accuracy of an RFOG [32]. The birefringent temperature coefficients of the two types of fibers were calculated and compared with the experimental results Both the theoretical simulation and the experimental results confirmed that a PM-PCF can be used to optimize an FRR, which can effectively suppress the polarization fluctuation
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