固体板条MOPA激光光束质量主动控制  

Closed-loop beam quality control for MOPA solid slab laser

作　　者：向汝建[1] 何忠武[1] 徐宏来[1] 雒仲祥[1] 杜应磊[1] 卢飞[1] 胡浩[1] 周文超[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,高能激光科学与技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2013年第2期358-362,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金重大项目(60890201)

摘　　要：详细介绍了固体板条MOPA激光系统输出光束特性,包括光束近场强度分布、波前畸变空间特性和时间频率特性等,并以此为设计输入,研制了大动态范围高空间分辨率变形镜。研制的自适应光学闭环校正系统在强光条件下,实现了全程闭环控制,光束质量β因子平均值从开环7.4提高到4.06。根据当前波前闭环校正残差,提出了进一步提高MOPA系统输出光束质量的方法。This paper introduces the beam characteristics of the MOPA slab laser system, including near-field intensity dis- tribution, spatial character and temporal frequency of wavefront distortion. The deformable mirror with large dynamic range and high spatial resolution was developed. The adaptive optics close＆loop correction system was designed to complete the closed-loop control of the whole propagation process of high power beams. The value of β of beam quality has been improved from 7.4 to 4.06. According to the residual error of the closed-loop wavefront correction, the beam quality of the MOPA might be further im proved

关 键 词：MOPA 光束质量 自适应光学 变形镜 波前畸变 

分 类 号：O439[机械工程—光学工程]