菲涅耳反射光强抑制及光隔离器测试系统设计  

Suppression of Fresnel reflected light and design of optical isolator test system

作　　者：李绪友[1] 何周[1] 张琛 洪伟[1] 

机构地区：[1]哈尔滨工程大学自动化学院,哈尔滨150001

出　　处：《中国惯性技术学报》2010年第2期225-229,共5页Journal of Chinese Inertial Technology

摘　　要：分析了菲涅耳反射光强对光纤陀螺的影响,提出了采用光纤研磨与折射率匹配相结合的方法抑制菲涅耳反射光,并进行了实验,实验结果表明该方案可成功的将反射光强从一百多微瓦降至万分之一纳瓦以下,消除了菲涅耳反射光强对陀螺信号的干扰;针对陀螺系统中采用光隔离器来隔离反射光对光源的影响,提出了一种使用很少仪器和元器件并能实现参数准确测量的光隔离器测试系统,实际测试了一款双级型光隔离器的主要性能参数并对测量结果与误差做了进一步的分析和讨论。The influence of Fresnel reflected light intensity on fiber optic gyroscope is analyzed, and the method to suppress Fresnel reflected light which combines the optical fiber polishing with refractive index matching is put forward. The experiment results show that the reflected light intensity can he restrained from about 100 mW to less than 10.4 nW, and the interference of Fresnel reflection light on gyroscope signal is eliminated. In view of the influence on the light source due to using optical isolator to isolate the reflected light, a light-isolating measure system which uses little equipments and components is put forward, and it can realize accurate measurement. A dual-stage optical isolator is measured by using this system, and the result is analyzed and discussed.

关 键 词：光纤陀螺 菲涅耳反射 光纤研磨 折射率匹配 

分 类 号：U666.1[交通运输工程—船舶及航道工程]