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首次采用琼斯矩阵建立了消偏型干涉式光纤陀螺完整光路传输系统的数学模型。在此基础上进行了光路偏振特性的理论分析,讨论了各器件的性能对陀螺偏振噪声的影响,分析了光纤消偏器的消偏作用。通过分析计算,得到了消偏型干涉式光纤陀螺的最大偏振误差表达式。在不同精度级别的消偏型光纤陀螺中,计算出了光纤消偏器应该达到的精度要求,为今后减小零漂打下了理论基础。
For the first time, the mathematical model of the complete optical transmission system of the depolarization interferometer fiber optic gyroscope was established by Jones matrix. On this basis, the theoretical analysis of the polarization characteristics of the optical path is carried out. The influence of each device’s performance on the gyro polarization noise is discussed. The depolarization effect of the fiber depolarizer is analyzed. Through the analysis and calculation, the maximum polarization error expression of the depolarization interferometric fiber optic gyroscope is obtained. In different depolarization optical fiber gyroscopes, the precision demanded by optical fiber depolarizer should be calculated, laying a theoretical foundation for reducing the zero drift in the future.