摘要
针对无源光学电流互感器的线性双折射问题,用琼斯矩阵分析了双折射对系统输出的影响。分析了输出光退化成圆偏振情况下光学电流互感器仍能传感电流的现象,以及输出光保持线偏振条件下系统输出电压仍受线性双折射影响的现象。分析了入射光偏转角、入射光相移与初始线性双折射对光学电流互感器输出的联合影响。结果表明,当初始双折射存在的情况下,随着入射光相移的变化,系统输出相对偏差存在极小值,且极小值对应的入射光相移随着初始双折射值而单调递增。由此提出增加入射光相移来减小初始线性双折射对系统输出影响的方法。用计算机仿真了理论计算结果,实验验证了这种方法的可行性。对改进无源光学电流互感器的性能、开发实用光学电流互感器具有参考意义。
The performance of passive Optical Current Transformer （OCT） with the linear birefringence is analyzed based on Jones matrix. The results show that passive OCT still works when the output light is circularly polarized, and the output voltage of passive OCT is affected by linear birefringence even though the output light is linearly polarized. The performance of passive OCT is analyzed when the Polarization angle and phase shift of the incident light and the different initial birefringence are introduced. The results show that when the initial birefringence exists, the relative deviation of system output has minimum. The corresponding incident light phase shift to minimum monotonically increases with the initial birefringence. A method of reducing the influence of passive OCT initial linear birefringence is proposed based on increasing the phase shift of incident light. The numerical and experimental results prove its feasibility. Developed practical optical current transformer has reference significance to improve the performance of passive OCT.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2008年第12期67-72,共6页
Opto-Electronic Engineering
基金
黑龙江省科技攻关资助项目(G202A330)
关键词
光学电流互感器
法拉第镜
线性双折射
琼斯矩阵
optical current transformer
Faraday rotation mirror
linear birefringence
Jones matrix
