【作者】 汪泠澜； 张建杰； 李汉钊； 严昱超； 马慧莲； 金仲和；

【Author】 Wang Linglan;Zhang Jianjie;Li Hanzhao;Yan Yuchao;Ma Huilian;Jin Zhonghe;School of Aeronautics and Astronautics, Zhejiang University;

【机构】 浙江大学航空航天学院；

【摘要】 谐振式光纤陀螺是一种基于Sagnac效应的高精度惯性导航传感器。它具有灵敏度高,全固态结构,利于小型化等多种优点。为了全面提高谐振式光纤陀螺的长期稳定性,针对谐振式光纤陀螺中的非互易噪声(偏振噪声与光学Kerr效应),设计并优化了具有起偏效果的保偏光纤偏振轴旋转熔接谐振腔,实现了偏振波动噪声的抑制,构建功率传输反馈控制系统,减少了光学Kerr效应波动的影响。为提高谐振式陀螺系统的线性度与动态范围,构建了数字式闭环检测信号处理系统。更多还原

【Abstract】 The resonant fiber optic gyro(RFOG) is a high accuracy inertial rotation sensor based on the Sagnac effect. Some countermeasures have been taken to improve the stability of the RFOG and suppress the nonreciprocal noises in the resonator. An improved scheme by inserting two in-line polar izers in the polarization maintaining fiber transmission-type resonator has been proposed to reduce the polarization-fluctuation induced drift. The light- intensity feedback loop is adopted to reduce the Kerr effect. Furthermore, a closed-loop RFOG based on the digital signal processor is designed to widen the dynamic range and improve the linearity.更多还原