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本文在介绍一种光学环形器基本原理和结构的基础上，着重分析了影响该环形器偏振灵敏度的因素，给出了偏振灵敏度的数学表达式。实验研制的光学环形器的测试值与理论值吻合较好。
Based on the introduction of the basic principle and structure of an optical circulator, this paper focuses on the analysis of the factors affecting the polarization sensitivity of the circulator, and gives the mathematical expression of polarization sensitivity. The experimental value of optical circulator is in good agreement with the theoretical value.