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测地激光陀螺反射镜法向位移影响分析

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测地激光陀螺是一种基于Sagnac效应的测量地球自转角速度的惯性传感装置,可应用于世界时、大地测量学等领域.激光陀螺一般由压电陶瓷控制推移反射镜来提高稳频精度.针对稳频机构工作过程中球面反射镜的法向位移对谐振腔的影响,从环腔稳定性定义出发,不同于传统的光学矩阵分析谐振腔稳定性,而是使用更真实的射线追踪仿真对球面反射镜法向位移时谐振腔的出光稳定性进行分析.仿真结果表明,环腔的尺寸与球面反射镜的法向可位移范围呈正相关,实验测得可位移范围为1.492～1.695 mm左右,实验与仿真结果误差在1％内.本文对测地激光陀螺在稳频机构工作过程中的球面反射镜法向位移的影响进行了初步探究,研究结果对于测地激光陀螺的稳频控制及陀螺搭建有一定参考意义.
Analysis of The Influence of Geodesic Laser Gyro Mirror Normal Displacement
Geodesic laser gyro is a kind of inertial sensing device based on the Sagnac effect to measure the an-gular velocity of the earth's rotation,which can be used in the fields of world time and geodesy.Laser gyro-scopes are generally controlled by piezoelectric ceramics to shift the mirror and improve frequency stability ac-curacy.In view of the influence of the normal displacement of the spherical mirror on the resonator during the operation of the frequency stabilizing mechanism,starting from the definition of ring cavity stability,a more realistic ray tracing simulation,which is different from the traditional optical matrix analysis of the resonator stability,is used to analyze the influence of the normal displacement of the spherical mirror on the light output stability of the resonator.The simulation results show that the size of the ring cavity is positively correlated with the normal displacement range of the spherical mirror.The displacement range measured by experiments is about 1.492-1.695 mm,and the error between the experimental and simulation results is within 1％.In this paper,the influence of normal displacement of spherical mirror on geodesic laser gyro during the operation of frequency stabilizing mechanism is studied.The research results have some reference significance for the frequency stabilizing control and gyroscope construction of geodesic laser gyro.

ring laser gyroscopestabilizing cavityray tracingreflectorfrequency stabilization control

胡天籁、郭文阁、王飞、张旭、张立松、高玉平、张首刚

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西安石油大学理学院,陕西西安 710065

中国科学院国家授时中心时间频率基准重点实验室,陕西西安 710600

湖南二零八先进科技有限公司,湖南长沙 410006

环形激光陀螺 稳定腔 射线追踪 反射镜 稳频控制

国科学院西部之光项目中国科学院"十三五"科教基础设施建设项目西安石油大学研究生联合培养基地项目西安石油大学创新与实践能力培养项目

中科院人字[2018]6号文件发改投资[2020]1394号文件西石大研[2017]43号YCS22113167

2024

10.3969/j.issn.1672-8785.2024.04.004

红外
中国科学院上海技术物理研究所

红外

影响因子：0.317
ISSN：1672-8785
年,卷(期)：2024.45(4)
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