基于高斯过程回归的线性激光束指向稳定优化  

Optimization of linear laser beam pointing stability based on Gaussian process regression

作　　者：刘哲生 张冬冬 李洪阳 宋立伟[2] 田野[2] LIU Zhesheng;ZHANG Dongdong;LI Hongyang;SONG Liwei;TIAN Ye(School of Physics Sciences,University of Science and Technology of China,Hefei 230026,China;State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;School of Physical Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]中国科学技术大学物理学院,安徽合肥230026 [2]中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800 [3]同济大学物理科学与工程学院,上海200092

出　　处：《应用光学》2023年第6期1265-1272,共8页Journal of Applied Optics

基　　金：国家自然科学基金(62105346);基础研究特区计划(JCYJ-SHFY-2021-002);中国科学院基础前沿科学研究计划(ZDBS-LY-SLH018);中国科学院基础研究青年团队(YSBR059)。

摘　　要：为解决激光应用中的光束指向抖动问题,提出一种基于高斯过程回归(Gaussian process regression)的激光光束指向稳定性优化方案。介绍了激光光束指向稳定系统装置构成及原理,论述了高斯过程回归方法的原理及其作为激光光束快速稳定控制算法的优势。经过该方法优化后,指向抖动达到水平方向2.3μrad,竖直方向3.3μrad,将激光系统指向稳定性提高了1个数量级以上。指向性抖动为已有线性反馈系统的20%,尤其对于高频噪声优化有显著效果。该研究对于激光光束指向性敏感的精密实验和精密加工具有重要意义。To solve the problem of beam pointing jitter in laser applications,a laser beam pointing stability optimization scheme based on Gaussian process regression was proposed.The composition and principle of the laser beam pointing stability system device were introduced,and the principle of Gaussian process regression method and its advantages as the fast stabilization control algorithm for laser beams were discussed.After optimization by this method,the pointing jitter reaches 2.3μrad in the horizontal direction and 3.3μrad in the vertical direction,which improves the pointing stability of the laser system by more than an order of magnitude.The pointing jitter is 20%of the existing linear feedback system,and has a significant effect on high-frequency noise optimization.This study is of great significance for precision experiments and precision machining that are sensitive to the directionality of laser beams.

关 键 词：高斯过程回归 线性激光束 系统设计 性能分析 

分 类 号：TN247[电子电信—物理电子学] O439[机械工程—光学工程]