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光纤陀螺光路的偏振误差抑制是光纤陀螺研制中的关键技术之一。根据实际的光纤陀螺的光路物理模型和琼斯矩阵理论,对光纤陀螺中光学器件和熔接点的光学参数进行了描述,建立了分立光学器件及光纤焊接点传输模型,该模型接近工程实际,并最终推导出完整的光路系统传输模型。对光路中关键器件Y波导的非理想因素进行了分析,分析了Y波导非理想因素对陀螺系统噪声的影响。根据不同陀螺精度的需求,该结果可以指导器件的筛选。另外该方法可以有效地分析光路系统缺陷对零偏和标度因数的影响,在工程上可作为评价干涉式光纤陀螺光路系统性能的一个途径。
Polarization error suppression of optical fiber gyro is one of the key technologies in the development of fiber optic gyro. According to the physical model of optical fiber and the Jones matrix theory, the optical parameters of the optical devices and splice points in the FOG are described, and the transmission models of the discrete optical components and the optical fiber solder joints are established. The model is close to the actual project and finally Derive the complete optical system transmission model. The non-ideal factors of the Y-waveguide of the key device in the optical path are analyzed, and the influence of Y-waveguide non-ideal factors on the gyroscopic system noise is analyzed. Depending on the accuracy of the gyro, this result can guide the screening of the device. In addition, this method can effectively analyze the influence of optical system defects on zero bias and scale factor, and can be used as a way to evaluate the performance of the optical system of an interferometric fiber optic gyroscope in engineering.