Gyro is a high precision inertial sensor. The resonant optical gyroscope, as the second generation of gyro,has higher precision than interference optical gyro. Because the stability of the gyro resonance frequency greatly influences the precision of the resonant optical gyro, the frequency stability and tunable performance of the light source is very important. The common source which meets the requirement, usually has large size. It is not conducive to miniaturization and integration. A control scheme of a semiconductor laser based on external cavity semiconductor laser on the basis of detection principle of the resonant optical gyro is introduced. The testing of new light source is also analyzed and designed. A proposition of constant temperature and control of current is put forward on the basis of analyzing the modulating signal of the light source. The current characteristic of external cavity semiconductor laser and the signal of entering the valley of the resonant gyroscope are analyzed.%陀螺是一种高精度的惯性传感器件,作为第二代陀螺的谐振式光纤陀螺,在理论上精度高于第一代干涉型光学陀螺.但是谐振式光学陀螺对光源有一个苛刻的要求,需要光源的调谐范围要宽,线宽要窄.一般达到要求的光源体积都很大,不利于谐振陀螺的小型化和成品化.基于谐振式陀螺的检测原理,提出了一种基于外腔半导体激光器的谐振陀螺控制方案,对光源的调制信号进行了分析,提出了温度恒定,控制电流的控制方案.并对外腔激光器电流特性和谐振陀螺入谷信号进行了分析.
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