全光纤电流互感器偏振误差分析

Polarization error analysis of the all fiber optical current transformer

借助琼斯矩阵方法分析并对比了两套具有不同反射镜结构的全光纤电流互感器(AFOCT)系统,计算讨论了系统各传感部件主要参量对零漂、测量准确度的影响。最后,验证了通过对传感光纤引入圆双折射以改善系统输出的方法,并定量给出了为满足IEC60044-标准中0.2S级测量互感器极限误差而加载的圆双折射具体值。

We computed and discussed the impact on the all-fiber optical current transformer＇s （AFOCT） output characteristic of the sensing components. The zero-drift and measurement deviation of two AFOCT systems with differ- ent reflecting mirror are studied. At last, we verify the rationality of a method to eliminate the interference of linear bi- refringence by applying circular birefringence on the sensing fiber. The retardation of the circular birefringence applied on the 0.2S class sensing fiber to meet the requirement of of IEC60044-8 standard is given.