激光陀螺增益特性的实验研究  

Experimental Investigation on the Gain Characteristics of Laser Gyro

作　　者：何小庆[1] 张振辉[2] 高爱华[1] 叶萍[2] 胡尚斌[1] 陆治国[1] 

机构地区：[1]西北大学物理学系,西安710069 [2]西安飞行自动控制研究所,西安710065

出　　处：《光子学报》2011年第3期370-374,共5页Acta Photonica Sinica

基　　金：航空科学基金(No.20090898001;No.20090898002);西北大学研究生自主创新实验(No.09YZZ54)资助

摘　　要：采用测量侧光谱相对强度的方法研究激光陀螺的增益特性.通过实验得到了陀螺增益随着工作电流的增加而增加,随着总气压的升高会出现饱和增益现象,在总气压大约为4P0时增益取极大值.通过比较铝阴极和另一种阴极材料B的激光陀螺在启动阶段增益随时间变化的特性曲线和对测量数据进行误差分析,发现陀螺的增益稳定性和抗外界环境干扰能力是与阴极材料密切相关的.激光介质的增益和由朗缪尔流效应引起的拍频频移都和产生激光的上下能级粒子数密度差有关,实验结果说明用增益的稳定性可以评价激光陀螺零点漂移稳定性.The gain characteristics of laser gyro were investigated by measuring the relative strength of the laser gyro′s side spectrum.It was obtained experimentally that the gain of the laser gyro increases with the increasing of the current,the gyro gain presents the saturated gain phenomena with the increasing of the total pressure and the gain reaches a maximum value when the total pressure is about equal to 4P0.By comparing the time-varying gain curves of aluminum cathode and B cathode gyroscope in the gyro′s start-up phase and corrying out error analysis of experimental data,the experimental results show that the gain stability and anti-environmental interference capability of B cathode gyro are better than that of aluminum cathode gyro.The gain of active medium and the beat′s frequency shift induced by the Langmuir flow effects both are related to the population density difference of the producing laser′s upper and lower level.The experimental results show that the zero drift′s stability of the laser gyro can be evaluated by the gyro gain′s stability.

关 键 词：侧光谱 相对强度 增益系数 增益稳定性 零点漂移 

分 类 号：V241.622[航空宇航科学与技术—飞行器设计]