Coupling Effect of a Single-Mode Fiber Coil Under Time-Varying Temperature and Magnetic Field

作者：Cui Liang, Dengwei Zhang, Yilan Zhou, Xiaowu Shu, Shuangliang Che, Cheng Liu · 发表于：Journal of Lightwave Technology · 年份：2019 · DOI：10.1109/jlt.2019.2912813 · 被引用次数：9 · 研究领域：Advanced Fiber Optic Sensors、Magneto-Optical Properties and Applications、Geophysics and Sensor Technology

A coupling effect in the single-mode fiber coil (SMFC) of a depolarized interference fiber optic gyroscope (De-IFOG) under time-varying temperature and magnetic field, which can cause a serious nonreciprocal phase error, is revealed. In this paper, the mechanism of the coupling effect is thoroughly studied and the related theory is derived in detail. Simulations and experiments are carried out to verify the validity. The experiments show a peak-to-peak value error of about 50 °/h in the SMFC when the magnitude of magnetic field is 10 Gauss and the temperature uniformly increases from 10 to 60 °C at the rate of 36 °C/h, which cannot be neglected in the applications of De-IFOGs.