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应用于高能激光器的XY离焦像差校正方法

冯亚飞 韦承甫 任晓明 郭建增 王杰

冯亚飞, 韦承甫, 任晓明, 郭建增, 王杰. 应用于高能激光器的XY离焦像差校正方法[J]. 中国光学(中英文), 2024, 17(2): 366-373. doi: 10.37188/CO.2023-0142
引用本文: 冯亚飞, 韦承甫, 任晓明, 郭建增, 王杰. 应用于高能激光器的XY离焦像差校正方法[J]. 中国光学(中英文), 2024, 17(2): 366-373. doi: 10.37188/CO.2023-0142
FENG Ya-fei, WEI Cheng-fu, REN Xiao-ming, GUO Jian-zeng, WANG Jie. An XY defocus aberration correction method for high-energy lasers[J]. Chinese Optics, 2024, 17(2): 366-373. doi: 10.37188/CO.2023-0142
Citation: FENG Ya-fei, WEI Cheng-fu, REN Xiao-ming, GUO Jian-zeng, WANG Jie. An XY defocus aberration correction method for high-energy lasers[J]. Chinese Optics, 2024, 17(2): 366-373. doi: 10.37188/CO.2023-0142

应用于高能激光器的XY离焦像差校正方法

doi: 10.37188/CO.2023-0142
基金项目: 国家高技术发展计划(No. 51326010201)
详细信息
    作者简介:

    冯亚飞(1989—),男,河北邯郸人,博士,高级工程师,2017年于浙江大学光电学院获得博士学位,主要从事激光技术方面的研究。E-mail:fengyafei@zju.edu.cn

    任晓明(1971—),男,河北邯郸人,研究员,主要从事激光技术方面的研究。E-mail:ren.xiaoming@163.com

  • 中图分类号: TN248

An XY defocus aberration correction method for high-energy lasers

Funds: Supported by National High-tech R&D Program (No. 51326010201)
More Information
  • 摘要:

    针对高能激光器出光过程中出现的大量离焦和0°像散低阶像差现象,提出了基于哈特曼波前传感器和二维整形光路的XY离焦像差校正方法。首先,通过对Zernike多项式的离焦项和0°像散项进行线性组合得到XY离焦像差的表达式,该XY离焦像差系数的大小可直接表征X离焦和Y离焦的波前PV值。同时,通过微调高能激光器中二维整形光路中的镜子间距,可实现激光器输出光束XY离焦波面的补偿。因此,首先利用哈特曼波前传感器提取出光束的XY离焦像差系数大小,而后再根据XY离焦像差系数的大小实时闭环微调二维整形光路中的镜子间距,从而实现XY离焦像差的校正,改善输出光束的光束质量。实验结果表明,该方法可有效地将高能激光器输出光束XY离焦量的PV值由5.2 μm和1.1 μm校正到0.5 μm以下,相应的光束质量β因子由3.1降到1.8,光束质量得到明显改善。

     

  • 图 1  (a)离焦波前和(b)0°像散波前

    Figure 1.  (a) Defocus wavefront and (b) 0° astigmatism wavefront

    图 2  (a)X离焦波前和(b)Y离焦波前

    Figure 2.  (a) X-defocus wavefront and (b) Y-defocus wavefront

    图 3  X方向整形光路结构示意图

    Figure 3.  Schematic diagram of shaping optical path structure in X direction

    图 4  低阶像差校正实验系统原理图

    Figure 4.  Schematic diagram of low-order aberration correction experiment system

    图 5  高精度电动平移台实物图

    Figure 5.  Physical picture of a high-precision electric displacement platform

    图 6  整形光路中凸柱面镜和凹柱面镜相对共焦间距不同偏移量时的XY离焦量变化曲线。(a)X方向整形光路;(b)Y方向整形光路

    Figure 6.  The XY defocus variation curves with the relatively different deviation of the co-focal distance of the convex cylindrical mirror and the concave cylindrical mirror in the (a) X-direction and (b) Y-direction shaping optical path

    图 7  像差未校正时XY离焦量变化曲线

    Figure 7.  PV curve of XY defocus aberrations with uncorrected aberration

    图 8  像差未校正时出光4.2 s时刻的远场光斑

    Figure 8.  Far-field spot at 4.2 s with uncorrected aberration

    图 9  像差未校正时激光器输出功率随时间的变化曲线

    Figure 9.  Laser output power over time with uncorrected aberration

    图 10  像差闭环校正时XY离焦量变化曲线

    Figure 10.  PV curve of XY defocus aberrations with closed-loop aberration correction

    图 11  像差闭环校正时出光4.2 s时刻的远场光斑

    Figure 11.  Far-field spot at 4.2 s with closed-loop aberration correction

    图 12  像差闭环校正时激光器输出功率随时间的变化曲线

    Figure 12.  Laser output power over time with corrected closed-loop aberration

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  • 收稿日期:  2023-08-20
  • 修回日期:  2023-09-08
  • 网络出版日期:  2023-11-07

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