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通过理论分析,得到了掺铒光纤环形腔激光陀螺中存在后向反射时,陀螺的两束激光频差和陀螺转速动态关系的解析表达式,并用矢量图明确表明了闭锁效应出现的条件。分析表明光纤激光陀螺的闭锁主要是由瑞利后向散射引起的,这一散射虽然在红外波长甚弱,但在有源环形腔内会被显著加强,因此成为陀螺闭锁的主要原因。实验证实了上述理论分析结果,在陀螺旋转速度小于10°/s时出现了闭锁。
Through theoretical analysis, the analytic expression of the dynamic relationship between the gyroscope's gyroscope rotational speed and the gyroscope's gyroscope is obtained when there is retroreflection in the erbium-doped fiber ring cavity laser gyroscope. The condition of the blocking effect is clearly indicated by the vector diagram. The analysis shows that the locking of fiber laser gyros is mainly caused by Rayleigh backscattering. Although this scattering is very weak in the infrared wavelength, it will be significantly strengthened in the active annular cavity, which becomes the main reason of gyroscopic locking. Experiments confirmed the above theoretical analysis results, the gyroscope rotation speed of less than 10 ° / s when the lock has emerged.