【作者】 张雪原；

【导师】 王政平；

【作者基本信息】 哈尔滨工程大学 ， 光学工程， 2005， 硕士

【摘要】 为了减小块状玻璃电流传感头中线性双折射与反射相移等互易性光学参量产生的有害影响提出了利用法拉第镜构成的具有折返传感光路的法拉第镜式光学电流互感器方案;分析了该系统的工作原理,对输出光偏振态进行了仿真,并与单层介质膜方案进行了对比。研究结果表明该方案对输出光偏振态的退化有很好的抑制作用。此外,还对FMOCT中某些关键器件对系统的影响开展了理论研究。结果表明法拉第镜引入的实际旋转角大小可引入系统误差;非理想NPBS的反射相移则会引起输出光偏振态的退化。这对于改进现有块状玻璃电流互感器的性能、开发实用型光学电流互感器具有一定的参考意义。更多还原

【Abstract】 Utilizing a Faraday rotation mirror, a Faraday rotation mirror-typed optical current transformer (OCT) design with turn-back optical paths is proposed to overcome the harmful effects of reciprocal optical parameters such as the linear birefringence and reflection-induced retardation inside the bulk glass current sensing head, and to multiply the sensing signal. The theoretical analysis of the working principle, the simulation results of the polarization state of the output light and the comparison between it and that of the OCT with polarization-preserving total reflection (PPTR) layers are presented. The results show that this design has a good restraining effect on the degeneration of the polarization state of the output light. Besides, the effects of some kernel devices such as Faraday mirror and non-polarization beam spliter (NPBS) are also analyzed theoretically. The results show that the practical rotation angle of the Faraday mirror can induce a system error to the output and the reflection-induced retardance of the NPBS may degenerate the state of polarization of the output light beam. These results might have certain reference significance on the performance improvement of the present bulk glass OCT, and the development of practical OCT.更多还原