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热效应对激光器光束质量的自适应调整技术

Adaptive Adjusting Technique of Thermal Effect to Laser Beam Quality

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摘要

在固体激光器中, 热效应会同时影响抽运光和振荡光的空间分布。研究表明, 对于端面抽运固体激光器而言, 通常存在一个特定的抽运功率区间, 使抽运光与基模振荡光在热效应的作用下, 在增益介质内部高度重合, 激光器的抽运光效率和光束质量得到大幅度提升。利用这一特点, 设计了一种激光器, 在抽运功率为105~115 W时, 实现了抽运光与基模振荡光空间分布的高度重合, 激光器光束质量因子小于2.3。在此区间外, 激光器光束质量因子迅速增加到3以上。提出了一种计算上述抽运功率区间的优化算法, 在端面抽运固体激光器中, 可以快速寻找到理想的抽运功率区间, 并与上述实验进行对比, 结果表明使用该方法寻找到的抽运功率区间与实验所得到的区间高度吻合, 相对误差低于5%, 可靠性高。

Abstract

Spatial distributions of pump beam and oscillating beam will be affected by thermal effect in solid state laser. The research shows that a specific pump power region is existed in end-pumped solid state laser. In this interval, pump beam and fundamental mode oscillating beam achieve large overlap in the gain medium under thermal effect, which results in higher efficiency of pump source and better beam quality of laser. Based on the characteristic, a laser is designed. Spatial distributions between pump beam and fundamental mode oscillating beam of the laser can achieve large overlap, and the beam quality factor is lower than 2.3 with pumping power ranging from 105 W to 115 W. Out of this range, the beam quality rapidly increases to more than 3. A new optimization algorithm is proposed to calculate the pump power region, which can find ideal pump power region rapidly in end-pumped solid state laser. Compared with the experiment, the pump power region of the proposed method achieves a higher level of compliance with experimental region, and the relative error is less than 5% with high reliability.

Newport宣传-MKS新实验室计划
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中图分类号:TN248.1

DOI:10.3788/aos201737.0514001

所属栏目:激光器与激光光学

基金项目:国家预研究基金(9140A020105)

收稿日期:2016-11-16

修改稿日期:2017-01-12

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作者单位    点击查看

屈鹏飞:西安电子科技大学物理与光电工程学院, 陕西 西安 710071
王石语:西安电子科技大学物理与光电工程学院, 陕西 西安 710071
过 振:西安电子科技大学物理与光电工程学院, 陕西 西安 710071
蔡德芳:西安电子科技大学物理与光电工程学院, 陕西 西安 710071
李兵斌:西安电子科技大学物理与光电工程学院, 陕西 西安 710071

联系人作者:屈鹏飞(qupengfei_119@163.com)

备注:屈鹏飞(1987—), 男, 博士研究生, 主要从事新型光电子器件方面的研究。

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引用该论文

Qu Pengfei,Wang Shiyu,Guo Zhen,Cai Defang,Li Bingbin. Adaptive Adjusting Technique of Thermal Effect to Laser Beam Quality[J]. Acta Optica Sinica, 2017, 37(5): 0514001

屈鹏飞,王石语,过 振,蔡德芳,李兵斌. 热效应对激光器光束质量的自适应调整技术[J]. 光学学报, 2017, 37(5): 0514001

被引情况

【1】鲁绍文,孟洁,赵学强,施君杰,孟俊清,于真真,侯霞,陈卫标,刘源. 高峰值功率窄脉宽宽温Nd∶GdVO4激光器. 中国激光, 2018, 45(4): 401009--1

【2】王启晗,姚强强,冯驰,陈薪羽,董渊. 热透镜焦距和球差影响光束质量的分析模型. 激光与光电子学进展, 2018, 55(8): 81402--1

【3】宋健,高欣,闫宏宇,张晓磊,张哲铭,徐雨萌,顾华欣,刘力宁,薄报学. 大功率半导体激光器波导热透镜效应及对慢轴光束发散角的影响. 中国激光, 2018, 45(10): 1005004--1

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