非线性光纤Sagnac干涉仪精度分析研究  

Research on Precision Analysis of Nonlinear Optical Fiber Sagnac Interferometer

作　　者：王巍 桑建芝 李明飞 刘院省[2,3] WANG Wei;SANG Jian-zhi;LI Ming-fei;LIU Yuan-xing(China Aerospace Science and Technology Corporation,Beijing 100048;Quantum Engineering Research Center of CASC,Beijing 100094;Beijing Institute of Aerospace Control Devices,Beijing 100039)

机构地区：[1]中国航天科技集团有限公司,北京100048 [2]中国航天科技集团有限公司量子工程研究中心,北京100094 [3]北京航天控制仪器研究所,北京100039

出　　处：《导航与控制》2020年第4期41-47,共7页Navigation and Control

摘　　要：非线性光纤Sagnac干涉仪具有突破标准量子极限的优点,可实现超高精度地球自转角速度的测量。通过理论建模和数值仿真,阐明了非线性光纤Sagnac干涉仪的增益系数、光纤环长度、光纤环面积和激光波长等参量对干涉仪精度的影响。在测量地速的条件下,光纤环半径取0.5m,光纤环长度为20km且非线性增益系数大于3.582时,干涉仪灵敏度能够达到10-6(°)/h(量级),为实现高灵敏度非线性光纤Sagnac干涉仪提供了支撑。The nonlinear optical fiber Sagnac interferometer has the advantage of breaking through the standard quantum limit,and can realize the ultra-high precision measurement of the earth rotation angular velocity.Through theoretical modeling and numerical simulation,the effects of parameters such as gain coefficient,fiber coil length,fiber coil area and laser wavelength on the accuracy of nonlinear fiber Sagnac interferometer are clarified.Under the conditions of measuring ground speed,the sensitivity of the interferometer can research 10-6(°)/h(level)when the fiber coil radius is 0.5 m,the fiber coil length is 20 km and the nonlinear gain coefficient is greater than 3.582,which provides support for the realization of high-sensitivity nonlinear fiber Sagnac interferometer.

关 键 词：干涉仪 非线性Sagnac效应 光纤环 地速测量 

分 类 号：TH744.3[机械工程—光学工程] V448.2[机械工程—仪器科学与技术]