谐振式微型光学陀螺(RMOG)是利用光学萨格纳克(Sagnac)效应产生的谐振频率差来测量旋转角速度的一种新型光学传感器,光波导环形谐振腔是谐振式微型光学陀螺的核心敏感部件。利用谐振腔内单点反射简化处理,结合多光束干涉叠加原理,得出了谐振腔背向散射输出谱线的表达式。在此基础上,利用激光器输出光频率进行扫描,对研制的保偏二氧化硅光波导环形谐振腔芯片进行了谐振曲线和背向散射谱的测试,得到了描述谐振腔背向散射特性的背向散射系数,实际测试曲线和理论仿真曲线吻合较好。

Resonator micro optic gyroscope (RMOG) is a novel optical rotation sensor whose resonant frequency is changed due to the Sagnac effect. Optical ring resonator is the key sensing element in RMOG. Using one-point reflection to simplify the distributed backscattering phenomenon in the resonator,combining the overlapping method of multiple beams,backscattering spectrum is theoretically formulated. On this basis,when the laser frequency is swept linearly to time,the resonance curve and the backscattering curve are measured on the polarization maintaining silica optical ring resonator. The backscattering coefficient is successfully obtained. Simulation shows that the experiments fit well with those obtained theoretically. It will supply the theoretical support to make research on the backscattering induced noise in RMOG.