无源谐振腔激光陀螺实验系统的研制

The research of a passive resonator gyroscope system

报道了采用反射型谐振腔结构的无源谐振腔激光陀螺系统。在实验室环境下，取得了漂移稳定性１．７ｄｅｇ／ｈ的性能。指出了引起陀螺漂移的误差因素，并提出进一步改善陀螺测量精度的措施。

A passive resonator laser gyroscope system composed of a reflective ring cavity is reported in this paper.The structure of the passive resonator is different from ordinary passive resonator:(1)there is only one lens in ring cavity to decrease the total loss of the cavity and to obtain much narrow resonative line width;(2)the intensity of the reflective light and the transmission light are minimum and maximum at the resonant centre respectively,so the SNR of reflective light can be greater than the SNR of transmission light;(3)the structure of the system is the compatible with passive resonator optical fiber gyroscope.The system has advanced performance,and its stability of drift is 1.7degree/hour in lab environment.The majoy reason causing drift is noise and closed loop control error in control circuit.