纵向磁场对激光陀螺非互易效应的影响

摘要

为了分析激光陀螺中纵向磁场导致的非互易效应,采用轻微非共面环形谐振腔的Jones矩阵,通过数值计算分析了顺逆时针本征模的椭圆度和方位角随磁场的变化关系,以及存在微小非共面角的情况下,频率分裂随磁场强度和腔失谐的变化.结果表明,在纵向磁场作用下,增益会影响顺逆时针本征模的椭圆度和方位角；增益越大磁敏感性越大,且腔失谐对磁敏感性也有一定的影响.这些发现对减小激光陀螺的磁敏感性有一定参考意义.%In order to analyze the nonreciprocal effect induced by longitudinal magnetic field in a ring laser, a mathematic model for the opposite waves in the ring laser was made based on Jones matrix. The ellipticity, azimuth and frequency difference of the opposite waves in case of slightly noncoplanar resonator were calculated. It is found that; the gain of the active medium subjected to a longitudinal magnetic field can influence the ellipticity and azimuth of the opposite waves; the magnetic sensitivity increases with the gain of the active medium and it is influenced by the detuning of the ring laser. The results obtained are helpful to reduce the magnetic sensitivity in a ring laser.