保偏光纤陀螺轴向磁敏感特性研究  

Research on the Axial Magnetic Characteristic in a Polarization Maintaining Fiber Optic Gyroscope

作　　者：张彩妮[1] 杨梦放 赵宇翔[1] 张登伟[1] 舒晓武[1] 刘承[1] 

机构地区：[1]浙江大学光电学院现代光学仪器国家重点实验室,杭州310027

出　　处：《光子学报》2015年第12期11-16,共6页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61203190)资助~~

摘　　要：研究了与光纤线圈敏感轴平行的轴向磁场作用下保偏光纤陀螺的漂移特性,建立了保偏光纤陀螺产生的非互易相位差与入射光偏振态关系的数学模型,并对该模型进行了实验验证.结果表明：轴向磁场对保偏光纤陀螺产生的非互易相位差源于光纤线圈内光纤的弯曲,且与线圈中光纤扭转分布具有密切关系,即当线圈绕制完毕,光纤扭转分布固定时,对应的保偏光纤陀螺轴向磁场灵敏度不变;保偏光纤陀螺轴向磁场灵敏度与射入光纤线圈内光的偏振态密切相关,通过改变入射偏振光的入射角,可在0~5°/h/mT范围内改变典型保偏光纤陀螺的轴向磁场灵敏度.The output characteristics of polarization maintaining fiber optic gyro were studied in the influence of the axial magnetic field parallel to the sensitive axis of the sensing coil.The mathematical model of the relationships between the nonreciprocal phase difference in polarization maintaining fiber optic gyro and the polarization state of incident light was established and verified by experiments.The results show that the drift caused by the magnetic field in the polarization maintaining fiber optic gyroscope come from the fiber＇s bending when coil is wounded,and the drift is closely related with the distribution of the fiber in the coil.The sensibility will not change after the sensing coil is completely manufactured because of the invariant distribution of the fiber twist.By changing polarization state of the incident light to some extent,the sensitivity of the axial magnetic field of polarization maintaining fiber optic gyro can be changed.

关 键 词：保偏光纤陀螺 轴向磁致非互易相位差 光纤线圈 光纤弯曲 光纤扭转 入射光的偏振态 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]