大功率长焦深高斯光束整形设计

李党娟; 王佳超; 陈阳; 杨金亮; 吴新宇; 苏俊宏

doi:10.37188/OPE.20202810.2129

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大功率长焦深高斯光束整形设计

现代应用光学 | 更新时间：2020-11-16

- 大功率长焦深高斯光束整形设计
- Design of high power long-coke deep-Gaussian beam shaping system
- 光学精密工程 2020年28卷第10期页码：2129-2137
- 作者机构：
  
  1.西安工业大学光电工程学院, 陕西西安 710021
  2.西安高斯激光科技有限公司, 陕西西安 710032
- 作者简介：
  
  [ "李党娟(1978-), 女, 陕西眉县人, 博士研究生, 副教授, 2004年于西安工业大学获得硕士学位, 2016年日本名古屋大学访问学者, 主要从事光学工程、光电信号检测方面的研究。E-mail:licy@xatu.edu.cn" ]
  苏俊宏(1963-), 男, 陕西白水人, 博士, 教授, 博士生导师, 现任陕西省光电测试与仪器技术重点实验室主任、陕西省光学学会副秘书长, 兼任中国光学学会光学测试专业委员会常务理事; 中国宇航学会光电技术专业委员会委员; 中国高等教育学会仪器科学与测控技术专业委员会委员; 担任国家科技奖励会评专家, 国家科技计划评审、教育部学位论文评审、长江学者奖励计划评审专家, 主要从事光电技术及理论、光电检测及器件的研究。E-mail:sujunhong@xatu.edu.cn SUN Jun-hong, E-mail:sujunhong@xatu.edu.cn
- 基金信息：
  
  装备预研领域项目(61406190501);陕西省科技计划项目(2019CGXNX-037);西安市碑林区科技计划项目(GX1911)
- DOI：10.37188/OPE.20202810.2129
  中图分类号： O439;O435.2;TN248.4
- 收稿日期：2020-02-07，
  
  修回日期：2020-04-02，
  
  录用日期：2020-4-2，
  
  纸质出版日期：2020-10-25
- 稿件说明：
移动端阅览
李党娟, 王佳超, 陈阳, 等. 大功率长焦深高斯光束整形设计[J]. 光学精密工程, 2020,28(10):2129-2137.

Dang-juan LI, Jia-chao WANG, Yang CHEN, et al. Design of high power long-coke deep-Gaussian beam shaping system[J]. Optics and precision engineering, 2020, 28(10): 2129-2137.
李党娟, 王佳超, 陈阳, 等. 大功率长焦深高斯光束整形设计[J]. 光学精密工程, 2020,28(10):2129-2137. DOI： 10.37188/OPE.20202810.2129.

Dang-juan LI, Jia-chao WANG, Yang CHEN, et al. Design of high power long-coke deep-Gaussian beam shaping system[J]. Optics and precision engineering, 2020, 28(10): 2129-2137. DOI： 10.37188/OPE.20202810.2129.

摘要

为了大功率激光设备工作时，减小高斯光束束腰半径外低能量所产生的边缘效应，避免出现毛边、搭接痕迹明显等问题，需要对它进行光束整形设计。针对大功率激光光源特性(输出平均光功率为500 W，脉冲宽度为130~160 ns，重复频率为20~50 kHz，波长为1 064 nm，功率调节范围为10%~100%)，为了减小系统的复杂性，提高激光能量的利用率，采用伽利略式非球面透镜整形系统进行参数优化；选取平顶洛伦兹模型为物理模型，根据能量守恒定律求得入射光与出射光之间的映射关系；采用光学软件对系统的结构参数和非球面系数进行优化。计算平顶光束在出射距离20，30 mm时的输出能量均匀度。结果表明：系统的工作焦深在20~30 mm时，平顶区激光能量均匀度均大于78.0%。以锈蚀的低碳钢板为作用目标进行了激光清洗实验，光斑作用区域内，激光与物质相互作用均匀，证明本设计能满足大功率激光使用环境的要求。

Abstract

To reduce the edge effect of low energy outside the waist radius of a Gaussian beam when high-power laser equipment is operating and avoid the problems of edge and lap marks

it is necessary to design effective beam shaping. First

to reduce the complexity of the system and improve the utilization of the laser energy

a high-power Gaussian laser light source(average optical power of 500 W

pulse widths in 130-160 ns

wavelength of 1 064 nm

and power regulation range of 10%-100%) was optimized using the Galileo aspheric lens shaping system.Second

through the law of conservation of energy

the mapping relationship between incident and emitted light was obtained

and the structural parameters and aspheric coefficients of the system were optimized and simulated using optical software. The output energy uniformity of the flat-top beam at ejection distances of 20

and 30 mm was calculated. The results show that the energy uniformity of the flat-top region is greater than 78.0% when the focal depth of the system is between 20 and 30 mm. A laser cleaning experiment is conducted using a rusted low-carbon steel plate. The interaction between laser and material is uniform in the area of spot action

proving that the design can meet the requirements of high-power laser environments.

关键词

Keywords

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