中文摘要：

基于对称双光路检测法，采用琼斯矩阵，提出了磁光式电流互感器（MOCT）的整体模型。该模型表明，MOCT的输出电压是两个分量的乘积，一个分量是线性分量，它正比于一次电流瞬时值，另一个分量是非线性分量，该分量与磁线振双折射和法拉第（Faraday）旋转角的共同作用相关。在没有磁线振双折射效应的理想MOCT系统中，当一次电流瞬时值较小时， MOCT的输出电压与一次电流瞬时值成正比。仿真结果证明了结论的正确性。

英文摘要：

The paper presents a model of whole magneto-optic current transformer （MOCT） based on symmetrical double-light circuit detection and Jones matrix. The research result indicates：the output voltage is two parts multiplying. One part is linear part, which is direct proportion to the primary current transient value. The other part is nonlinear part, which is related with the magnetic linear birefringence effect and Faraday Effect. In ideal MOCT system without magnetic linear birefringence effect, when the primary current transient value is small enough, the output voltage of MOCT is direct proportion to the primary current transient value. Simulation results verify the exactitude of conclusion.