腔镜失调对激光陀螺信号输出的影响  

Investigation on the Signal Output of RLG with Tilted Reflector

作　　者：高爱华[1] 何小庆[1] 张炜[2] 胡尚斌[1] 陆治国[1] 

机构地区：[1]西北大学物理学系,西安710069 [2]西安邮电学院

出　　处：《光子学报》2011年第6期823-827,共5页Acta Photonica Sinica

基　　金：航空科学基金(No.20090898001);航空科学基金(No.20090898002);西北大学研究生自主创新实验项目(No.09YZZ54)资助

摘　　要：研究了不同腔镜结构不同失调情况对空间谐振式激光陀螺中光束空间位置的影响.利用Collins积分与Collins程函理论以及MATLAB软件工具,对腔镜失调前后激光陀螺中光束传输进行了仿真计算.结果表明,相同失调量的不同反射镜所产生的拍频频差是不同的,且分别从M1和M4镜探测到的拍信号频不相同;对于小增益激光器,使用球面镜的腔镜结构较平面镜的腔镜结构更易形成稳定光束空间位置分布;由所计算的空间坐标xn可以看出,双向行波光束的光斑中心发生了偏移,在一定的失调量下将会影响到激光陀螺的拍频输出.研究结果对激光陀螺的工程检测和腔镜调整有指导作用,有助于激光陀螺测量准确度的提高.The spatial locations of the beam in spatial resonator gyroscope under different maladjustments were mainly studied.According to theories of Collins′s Integral and Collins′s EIKONAL Function and making full use of the MATLAB software,the beam transmission of RLG was simulated and calculated because of the resonator′s maladjustment.From the simulation results of three different structures,it was found that different mirrors with the same maladjustment cause different results on the beat output,and the beat signals detected from mirror M1 and M2 are different;for the small-gain lasers,the structure using the spherical mirror can easily form the stable beam structure compared with the plane mirror;from the calculated spatial coordinates xn it can be got that the centers of the Gaussian spot of clockwise and counterclockwise wave occur shift and effect the beat output of laser gyros in the certain amount of offset.This work has some instructive significance on the engineering testing and endoscopes adjustment of the laser gyro,and contributes to the improvement of measuring accuracy of laser gyro.

关 键 词：激光陀螺 拍频输出 失调 Collins程函 

分 类 号：V241.03[航空宇航科学与技术—飞行器设计]