Precision Cavity Length Control System Design for Ring Laser Gyroscope

Laser gyroscope is a kind of high precision angular sensor which has been widely used in strapdown inertial navigation system. The cavity length of laser gyroscope varies with the external temperature changes, which have influence on the scale factor stability and bias stability. In this regard, to control cavity length of laser gyroscopes with higher precision and reliability, a precision cavity length control system with self-adaption temperature compensation method is designed. The main motivation of this contribution is to design the higher accurate cavity length control system with self-adaption temperature compensation algorithm embedded. Experimental tests show the significant performance and effectiveness of cavity length control system proposed.