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为了改善四频差动激光陀螺环形腔内光束的传输质量,基于差分损耗理论,结合数理统计方法,研究了石英晶体光轴失配角和旋光角变化对环形腔内左、右旋光场偏振态的影响,分别探究了差分损耗在各自集合内均方根、取值范围和方差的变化规律。结果表明:为了达到理想的左、右旋对称性偏振光和稳定的腔结构,光轴失配角需接近0°,旋光角也只能在90°附近波动。差分损耗统计参量的不同限定值也为激光陀螺腔结构稳定性的定量描述提供了依据。
In order to improve the transmission quality of the light beam in the annular cavity of quadrupole differential laser gyroscope, based on the theory of differential loss and mathematical statistics, the effects of the mismatch angle and the rotation angle of optical axis of the quartz crystal on the polarization state of the left and right optical fields Influence, explore the law of variation root mean square, value range and variance of differential loss in their respective sets. The results show that in order to achieve ideal left-handed and right-handed symmetric polarized light and stable cavity structure, the misalignment angle of the optical axis needs to be close to 0 ° and the rotation angle can only fluctuate around 90 °. The different limits of the statistical parameters of differential loss also provide the basis for the quantitative description of the stability of cavity structure of laser gyro.