激光与光电子学进展, 2017, 54 (10): 100606, 网络出版: 2017-10-09
谐振式光纤陀螺克尔效应误差的抑制
Suppression of Kerr-Effect-Induced Bias for Resonator Fiber Optic Gyroscope
光纤光学 谐振式光纤陀螺 克尔效应 动态反馈 光强控制 fiber optics resonator fiber optic gyroscope Kerr effect dynamic feedback light intensity control
摘要
光纤克尔效应是影响谐振式光纤陀螺(RFOG)性能提升的重要因素之一。以光纤克尔效应为基础, 结合Sagnac效应, 建立RFOG克尔效应零偏误差的理论模型, 分析谐振腔内顺、逆时针光路中输出耦合器的耦合比之差以及谐振腔两臂长度差对陀螺零偏误差的影响, 提出结合RFOG结构设计的光强控制方案, 并通过4轮实验验证该方案的有效性。结果表明, 该方案能有效抑制克尔效应, 零偏误差从0.150 (°)/s降低至0.017 (°)/s, light path零偏稳定性从1300 (°)/h提升至140 (°)/h, 陀螺样机性能提升近1个数量级。
Abstract
Kerr effect is one of the key factors limiting the performance of the resonator fiber optic gyroscope (RFOG). Based on the Kerr effect and Sagnac effect, we establish a theoretical model of gyroscope Kerr effect bias error of RFOG, and analyze the influence of difference of coupling ratio of the output couplers in clockwise and counter-clockwise beam paths in fiber resonator and the difference of lengths of two resonant cavity arms on the performance of the gyroscope. In addition, we also present a scheme to suppress the Kerr effect bias error by coupling light intensity control and structure design of the RFOG. After 4 runs of individual experiments, it is shown that the proposed scheme can effectively suppress the Kerr effect. The gyroscope bias is reduced from 0.150 (°)/s to 0.017 (°)/s, and the bias stability is increased from 1300 (°)/h to 140 (°)/h. The gyroscope performance can be improved by nearly one order of magnitude.
雷兴, 胡强, 李俊, 王珂. 谐振式光纤陀螺克尔效应误差的抑制[J]. 激光与光电子学进展, 2017, 54(10): 100606. Lei Xing, Hu Qiang, Li Jun, Wang Ke. Suppression of Kerr-Effect-Induced Bias for Resonator Fiber Optic Gyroscope[J]. Laser & Optoelectronics Progress, 2017, 54(10): 100606.