传统双级光隔离器45°装配无法达到隔离度最优化问题。从双级光隔离器的光学结构和工作原理入手,分析了双级光隔离器的插入损耗、反向隔离度,以及偏振相关损耗,使用MATLAB定量分析了双级隔离器装配存在偏转角度误差时的插入损耗和反向隔离度,为双级隔离器装配的最佳化提供了理论上应保证44°装配这一可行的保障方法。 The traditional two-stage optical isolator 45 ° assembly can not achieve the isolation optimization problem. Based on the optical structure and working principle of the two-stage optical isolator, the insertion loss, reverse isolation and polarization-dependent loss of the two-stage optical isolator were analyzed. The error of deflection of the two-stage isolator assembly was quantitatively analyzed by MATLAB The insertion loss and reverse isolation provide a theoretical guarantee for the assembly of the two-stage isolator in a feasible 44 ° assembly method.