光学学报, 2020, 40 (21): 2114001, 网络出版: 2020-10-25  

基于Lamb理论的激光陀螺光强调谐线型研究 下载: 1081次

Study on the Intensity Tuning Curve in a Laser Gyro Based on Lamb Theory
作者单位
1 西安理工大学机械与精密仪器工程学院, 陕西 西安 710048
2 西安现代控制技术研究所, 陕西 西安 710065
摘要
He-Ne气体环形激光器是激光陀螺的核心器件。为了避免环形激光器内部与转动方向同、反向的运转模对产生模竞争效应,单纵模工作激光陀螺需要调整增益介质内Ne同位素构成,采取双同位素增益介质。为此,采用Lamb理论和等离子体色散函数,研究增益介质Ne同位素频率分裂、同位素配比、充气压力等因素对环形激光器光强调谐曲线线型的影响。实验上搭建了激光陀螺光强调谐曲线检测实验平台,在Ne 20和Ne 22充气比例分别为1∶1和7∶3,充气压力为400 Pa的条件下,检测环形激光器的光强调谐曲线,验证了理论分析的正确性,该研究为激光陀螺在双纵模频率非对称位置处实现稳频奠定了基础。
Abstract
He-Ne gas ring lasers are the core device of laser gyros. In order to avoid the competition effect of the modes operating in the same and reverse directions with rotation in a ring laser, the laser gyro at the single longitudinal mode needs to adjust the composition of Ne isotopes in the gain medium and adopt a dual-isotope gain medium. For this purpose, the Lamb theory and plasma dispersion function were used to study the effects of the frequency splitting of Ne isotopes, isotope composition, inflation pressure, and other factors on the intensity tuning curves of a ring laser. Besides, the experimental platform for the line-type detection of the intensity tuning curves in the laser gyro was set up. At the Ne 20/Ne 22 ratios of 1∶1 and 7∶3 and the inflation pressure of 400 Pa, the intensity tuning curves of the laser gyro were detected, verifying the correctness of the theoretical analysis. In conclusion, this study lays a foundation for the frequency stabilization of laser gyros at the asymmetrical position of frequency with double longitudinal modes.

刘健宁, 刘玉洁, 焦明星, 蒋军彪, 翁浚, 郭兰朋. 基于Lamb理论的激光陀螺光强调谐线型研究[J]. 光学学报, 2020, 40(21): 2114001. Jianning Liu, Yujie Liu, Mingxing Jiao, Junbiao Jiang, Jun Weng, Lanpeng Guo. Study on the Intensity Tuning Curve in a Laser Gyro Based on Lamb Theory[J]. Acta Optica Sinica, 2020, 40(21): 2114001.

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