Suppression of modulation-induced polarization error in spliceless open-loop fiber optic gyroscope [Invited]  

作　　者：Lin Chen Peitong He Biqiang Jiang Jianlin Zhao 陈琳;何沛彤;姜碧强;赵建林(Key Laboratory of Light Field Manipulation and Information Acquisition,and Shaanxi Key Laboratory of Optical Information Technology,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China;Zhejiang Lab,Hangzhou 311100,China)

机构地区：[1]Key Laboratory of Light Field Manipulation and Information Acquisition,and Shaanxi Key Laboratory of Optical Information Technology,School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710129,China [2]Zhejiang Lab,Hangzhou 311100,China

出　　处：《Chinese Optics Letters》2024年第7期6-11,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61975166,62322510,and 62375223).

摘　　要：The suppression of polarization cross talk in lead zirconate titanate phase modulators as a key error source has been challenging for open-loop fiber optic gyroscopes(FOGs).We developed a polarization-diversity optical frequency domain reflectometry(OFDR)to measure the distributed modulation polarization error in the modulator.The error contributes 8×10^(−6) rad to FOG’s bias instability.Using a UV-fabricated in-fiberλ/4 wave plate and polarization-mode converter with fiber taper technology,the modulation error has been suppressed by 15 dB in assembled FOGs.This approach reduced error with temperature from 25°/h to 0.7°/h,meeting the requirements of control-level gyroscopes with bias errors less than 1°/h.

关 键 词：fiber optic gyroscope inline wave plate optical frequency domain reflectometry polarization-mode converter 

分 类 号：TN253[电子电信—物理电子学] TN761