Three-dimensional model of thermal-induced optical phase shifts in rotation sensing  

作　　者：李绪友 凌卫伟 魏延辉 许振龙 

机构地区：[1]Harbin Engineering University, College of Automation

出　　处：《Chinese Optics Letters》2015年第9期9-13,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51205074);the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20112304120007);the Harbin Specialized Research Foundation for Innovation Talents(No.RC2012QN009037)

摘　　要：By studying the thermal-induced phase shift mechanism of an interferometric fiber-optic gyroscope （IFOG） sensing coil, a novel generalized expression based on a three-dimensional （3D） model is proposed. Compared with the traditional pure Shupe effect model, the simulation results show that the new 3D model, including elastic strain and the elasto-optical effect, can describe the thermal effect of the coils more accurately. Experiments with temperature change rates between -40℃ and 70℃ are performed to verify the effectiveness of the proposed generalized expression. The results of our work can guide researchers in identifying countermeasures to reduce the thermal-induced bias error in IFOG.By studying the thermal-induced phase shift mechanism of an interferometric fiber-optic gyroscope （IFOG） sensing coil, a novel generalized expression based on a three-dimensional （3D） model is proposed. Compared with the traditional pure Shupe effect model, the simulation results show that the new 3D model, including elastic strain and the elasto-optical effect, can describe the thermal effect of the coils more accurately. Experiments with temperature change rates between -40℃ and 70℃ are performed to verify the effectiveness of the proposed generalized expression. The results of our work can guide researchers in identifying countermeasures to reduce the thermal-induced bias error in IFOG.

关 键 词：GYROSCOPES Phase shifters 

分 类 号：TN966[电子电信—信号与信息处理]