对轴误差对光纤陀螺输出的影响  

Effect of the Principal Axes Angle-Offsets on Fiber-optic Gyroscope Output

作　　者：杨学礼[1] 王学锋[1] 张蔚[1] 徐鹏[1] 

机构地区：[1]中国航天时代电子公司,北京100854

出　　处：《光子学报》2009年第7期1658-1661,共4页Acta Photonica Sinica

基　　金：国防科工委基金资助

摘　　要：理论分析并试验研究了Y波导保偏尾纤与保偏光纤线圈之间熔接点的对轴误差对光纤陀螺输出的影响.根据简化的光纤陀螺光路误差模型,对光纤陀螺的输出相位误差与光路中主要耦合点的对轴误差的关系进行了理论推导和仿真分析,并利用一个实际的闭环光纤陀螺试验研究了主要熔接点的对轴误差变化对光纤陀螺零偏和零偏稳定性的影响.结果表明,Y波导保偏尾纤与保偏光纤线圈之间的对轴误差是引起光纤陀螺输出误差的重要因素,必须尽量减小.The effect of the principal axes angle-offsets of two splice points between the Y branch and PM fiber coil on the output errors of fiber-optic gyroscope （FOG） was investigated theoretically and experimentally. According to a simplified error model of the optical circuit of FOG,the relation between the phase error of FOG and the principal axes angle-offsets of the main coupling points was derived and emulated. Then using a closed-loop FOG, the variations of the bias and bias stability of FOG when changing the principal axes angle-offsets of the splice points were researched experimentally. The theoretical and experimental results show that the principal axes angle-offsets of two splice points between the Y branch and PM fiber coil are important factors affecting the output errors of FOG,and it should be reduced to the least.

关 键 词：光纤陀螺 对轴误差 保偏光纤 输出相位误差 偏振 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计] TN253[电子电信—物理电子学]