应用于谐振式光学陀螺的正弦波调制解调技术

摘要

Resonant optic gyro ( ROG) is a high-precision inertial sensor which achieves rotation angular velocity detection based on optical Sagnac effect .For plenty of glitch noise can be superimposed on resonant signal based on the technology of saw -tooth and triangle wave modulation ,moreover,the reset pulse is consisted in the system .But,the above problems can be solved by sine wave modulation ,which can achieve higher modulation frequency .A modulation and demodulation test system of optical micro resonant cavity was built .The influence of sine wave modulation on resonance curve and frequency curve was tested .At the modula-tion frequency of 4 MHz and the modulation amplitude of 2 V,the most smooth resonance curve and the best linearity frequency curve were obtained .The consequence provides a reference for optical micro resonant cavity to select the best parameters of phase modulation in the resonator gyroscope system applications .%谐振式光学陀螺（ ROG）是一种基于光学Sagnac效应检测转动角速度的高精度惯性传感器。锯齿波和三角波调制会导致谐振信号出现大量毛刺噪声以及复位脉冲的问题，通过正弦波调制解调可以解决上述问题，而且具有更高调制频率的优势。搭建了光学微谐振腔调制解调实验系统，分析了正弦波调制参数的变化对谐振曲线与鉴频曲线的影响。在调制频率为4 MHz，调制幅值为2 V时，得到了最为平滑的谐振曲线与最佳线性度的鉴频曲线。为光学微谐振腔在谐振式陀螺系统应用中相位调制选择最佳的参数提供了参考。