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高能激光光束质量β因子的影响因素分析

王艳茹 王建忠 冉铮惠 丁宇洁

王艳茹, 王建忠, 冉铮惠, 丁宇洁. 高能激光光束质量β因子的影响因素分析[J]. 中国光学, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137
引用本文: 王艳茹, 王建忠, 冉铮惠, 丁宇洁. 高能激光光束质量β因子的影响因素分析[J]. 中国光学, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137
WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137
Citation: WANG Yan-ru, WANG Jian-zhong, RAN Zheng-hui, DING Yu-jie. Analysis of effects on the beam quality β factor of high power laser[J]. Chinese Optics, 2021, 14(2): 353-360. doi: 10.37188/CO.2020-0137

高能激光光束质量β因子的影响因素分析

doi: 10.37188/CO.2020-0137
基金项目: 国防科工局技术基础项目(No. JSJL2017212B002)
详细信息
    作者简介:

    王艳茹(1983—),女,陕西渭南人,博士,高级工程师,2011年于中国科学院光电技术研究所光学工程专业获得博士学位,目前主要从事光学计量与检测技术方面的研究工作。E-mail:wyr3235@163.com

    王建忠(1974—),男,四川大邑人,硕士,高级工程师,分别于四川大学和电子科技大学获学士和硕士学位,主要从事无线电及光学计量测试技术研究。E-mail:WJLZ1999@sina.com

  • 中图分类号: O438

Analysis of effects on the beam quality β factor of high power laser

Funds: Supported by Basic Project of Science Technology and Industry for National Defense (No. JSJL2017212B002)
More Information
  • 摘要: 采用二维线性调频z变换算法,分析了影响高能激光系统光束质量β因子测量准确性的因素。本文详细分析了采样点数(即衍射极限内的采样点数)和衍射光斑图像的能量损失率对光束质量β因子的影响。在衍射极限角直径2 (λ/D)范围内不同采样点数的模拟结果表明:采样点数越高,光斑衍射图像的分辨率越高,进而光束质量β因子计算越准确。在一倍衍射极限角2.44 (λ/D)范围内应最低不少于10个采样点,即可将β因子的测量误差控制在3%。同时,不同像差对光斑图像能量损失率的敏感程度不同,相同能量损失率下,高阶像差的β因子测量误差要高于低阶像差。特别是球差类的像差对能量损失最为敏感, 约5%的能量损失就可带来15%~30%的β因子计算误差。
  • 图  1  基于不同采样点数的衍射光斑图像

    Figure  1.  The obtained diffraction beam figures based on different sampling numbers

    图  2  理想光束质量β因子随采样点数的变化规律

    Figure  2.  Beam quality β factor varies with sampling number of the ideal beam

    图  3  球差类像差对应的光束质量β因子随采样点数的变化规律

    Figure  3.  Variations of beam quality β with sampling number corresponding to the spherical, second-spherical and third-spherical wavefront aberrations

    图  4  球差像差A11对应的桶中功率(PIB)随采样点数的变化

    Figure  4.  Variations of power in bucket (PIB) with sampling number for the spherical wavefront aberration

    图  5  几种典型像差类型的PIB曲线和光束质量β因子值

    Figure  5.  PIB curves and beam quality β of several typical wavefront aberrations

    图  6  (a)离焦、(b)像散、(c)彗差和(d)初级球差对应的光束质量β因子测量误差与能量损失比的关系曲线

    Figure  6.  Relationship of measurement error curves of β factor with different energy losses corresponding to (a) the power, (b) the astigmatism, (c) the coma and (d) the spherical aberrations respectively

    图  7  不同像差的能量损失比与光束质量β因子的测量误差的关系

    Figure  7.  Relationship between measurement errors of β factor and energy loss ratios of different aberrations

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出版历程
  • 收稿日期:  2020-07-27
  • 修回日期:  2020-08-15
  • 网络出版日期:  2021-02-05
  • 刊出日期:  2021-04-01

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