环形激光器双光路椭圆度测量系统  

Ellipticity measurement system with double beam paths for ring laser gyroscope

作　　者：杨昊东[1,2] 梁冬明 岳寰宇 范汉伟 刘立武 

机构地区：[1]中国洛阳电子装备试验中心,河南洛阳471003 [2]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《光学精密工程》2012年第9期1913-1921,共9页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.61078017)

摘　　要：针对通过测量输出光椭圆度对环形激光器进行调腔的要求,研究并建立了环形激光器双光路椭圆度测量系统。计算分析了无源环形腔对S线偏光和P线偏光的频率响应特性,得出S线偏光谐振峰频率特性更适于无源环形腔的稳频。采用S线偏光作为外部输入光来提高稳频精度,搭建了环形激光器双光路稳频与测量系统。环形激光器稳频系统在10s内就能完成稳频,稳频效率高,稳频后光强波动幅度为1.8%。提出的椭圆度测量方法使椭圆度变化幅度约为0.65%,减小了光强波动对测量精度的影响。实验显示,构建的测量系统可满足椭圆度测量的要求。On the basis of the requirements of cavity adjustment completed by measurement ellipticity, an ellipticity measurement system with double beam paths was researched for adjusting the cavity of a ring gyro laser. The frequency response characteristics of a square ring resonator to the S line polar- ized light and P line polarized light were analyzed, and the S line polarized light was chosen to stabilize the frequency of a positive resonant cavity. By inputting the S polarized beam to improve the frequency stability accurately, a frequency stabilization system and a ellipticity measurement system with double beam paths were established. By utilizing the new frequency-stabilization system and measurement methods, the frequency stabilization of the system can be realized in 10 s and the stabilization accuracy is better than 1. 8%. Furthermore, the fluctuation of ellipticity has been 0. 65% by the proposed method, which reduces the effect of light fluctuation on the measurement accuracy. In conclusion, the proposed system meets the needs of ellipticity measurement.

关 键 词：环形激光器 环形谐振腔 稳频 椭圆度测量 模式分析 

分 类 号：TN248[电子电信—物理电子学]