针对实际系统中的单轴干涉式光纤陀螺仪结构与稳定性问题，提出将Lyot 消偏器引入到陀螺光学结构中，新结构在不改变原陀螺光路高精度特性的基础上，使系统输入极低偏振度的自然光，提高了单轴光纤陀螺的精度和稳定性。利用琼斯矩阵与干涉矩阵建立了单轴干涉式光纤陀螺的系统模型，对该陀螺的输出及零点偏移情况进行了仿真分析和实验研究。结果表明，该设计结构在提高了陀螺系统的精度与稳定性的同时，还在一定程度上降低了系统对光源偏振度的要求。

Aiming at the structure and stability problems of the single axis Interferometric Fiber Optic Gyroscopes (IFOG), fiber Lyot depolarizer was introduced in the light path system. Due to the new structure of the light path system, the very low polarization natural light was obtained in the gyroscope to ensure the accuracy and stability of the gyroscope. Using Jones matrix and coherence matrix, the model of interferometric fiber optic gyroscope system was established for the simulation analysis of the zero bias, and the result was verified by experiment. It was obvious that the light path system could maintain high accuracy and stability of the gyroscope system with the lower requirements of the polarization of the light.