Faraday镜预转角对FMOCT输出光偏振态的影响  

Influence of Bias Angle of Faraday Mirror upon Polarization State of Output Light of FMOCT

作　　者：黄宗军[1] 康崇[1] 王政平[1] 刘宁宁[1] 

机构地区：[1]哈尔滨工程大学理学院,哈尔滨150001

出　　处：《光子学报》2006年第8期1203-1206,共4页Acta Photonica Sinica

基　　金：哈尔滨工程大学基础研究基金资助(HEUF04015)

摘　　要：通过计算机仿真,运用琼斯矩阵理论分析了Faraday镜预转角对法拉第镜式光学电流互感器输出光偏振态的影响.实验测量了Faraday镜实际预转角的大小,测量了外磁场的改变对Faraday镜预转角的影响.外磁场的存在和变化使Faraday镜预转角偏离初始值,并使系统输出光由理想状态下的线偏振光退化成椭圆偏振光,并引起法拉第镜式光学电流互感器工作灵敏度和稳定性的下降.提出了用电磁屏蔽解决外界磁场影响的方法.By the way of computer simulation, the influence of bias angle of Faraday mirror upon polarization state of output light of Faraday Mirror-typed Optical Current Transformer is analyzed using the theory of Jones Matrix. The value of actual bias angle of Faraday mirror and the effect of out magnetic field upon bias angle of Faraday mirror are measured by experimentally. Existence and changes of out magnetic field cause bias angle of Faraday mirror deviating initial value and output light of system degenerating into elliptical polarization light from ideal linear polarization light. It brings the decline of sensitivity and stability of FMOCT. At the same time solving the influence of out magnetic field by electromagnetic shield is proposed.

关 键 词：偏振光学 光学电流互感器 法拉第镜 线性双折射 反射相移 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]