Analysis of Intensity Variation of Laser in Resonator Micro-optic Gyro

摘要

The paper describes the basic principle and structure of the resonator micro-optic gyro (RMOG),the influence of intensity variation of laser is mathematically formulized,analyzed and experimentally validated for the first time.Firstly,the relationship between the light intensity input the integrated optical resonator (IOR) and the slope at working range is simulated and analyzed by the optical field overlapping method.Secondly,the amplitudes of the output square waveforms with different zero biases are simulated and analyzed.The influence of intensity variation has a high correlation with the zero bias between the CW and CCW resonance frequency.Finally,the experimental setup is constructed and the related measurement is performed,the test result shows that in order to reach the limited ultimate sensitivity of 15.5 deg/h,it is necessary to restrict the zero bias within 9.81 deg/s under open-loop output scheme,furthermore,in order to eliminate the noise induced by the intensity variation of laser and realize high performance,a close-loop operation is required.