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不同脉冲宽度355 nm波长激光诱导DKDP晶体损伤特性

徐子媛 王岳亮 赵元安 邵建达

徐子媛, 王岳亮, 赵元安, 等. 不同脉冲宽度355 nm波长激光诱导DKDP晶体损伤特性[J]. 强激光与粒子束, 2019, 31: 091004. doi: 10.11884/HPLPB201931.190164
引用本文: 徐子媛, 王岳亮, 赵元安, 等. 不同脉冲宽度355 nm波长激光诱导DKDP晶体损伤特性[J]. 强激光与粒子束, 2019, 31: 091004. doi: 10.11884/HPLPB201931.190164
Xu Ziyuan, Wang Yueliang, Zhao Yuan'an, et al. Laser damage behaviors of DKDP crystals dominated by laser pulse duration[J]. High Power Laser and Particle Beams, 2019, 31: 091004. doi: 10.11884/HPLPB201931.190164
Citation: Xu Ziyuan, Wang Yueliang, Zhao Yuan'an, et al. Laser damage behaviors of DKDP crystals dominated by laser pulse duration[J]. High Power Laser and Particle Beams, 2019, 31: 091004. doi: 10.11884/HPLPB201931.190164

不同脉冲宽度355 nm波长激光诱导DKDP晶体损伤特性

doi: 10.11884/HPLPB201931.190164
基金项目: 

国家自然科学基金项目 12345678

详细信息
    通讯作者:

    王岳亮(1990—), 男,博士,工程师,从事激光与材料相互作用研究; moonwyl1990@siom.ac.cn

  • 中图分类号: O77+4

Laser damage behaviors of DKDP crystals dominated by laser pulse duration

  • 摘要: 研究了用于三倍混频的Ⅱ类DKDP晶体在35 ps,850 ps和7.6 ns三种不同脉宽355 nm波长激光作用下的损伤特性。实验对比分析了损伤阈值、概率和损伤针点形貌、尺寸和密度,并根据损伤阈值及概率得到前驱体阈值及密度。结果表明,前驱体的激光能量吸收量与脉宽线性相关。35 ps激光作用下DKDP有一种前驱体吸收激光能量形成熔融状损伤针点。850 ps激光作用下有两种前驱体吸收激光能量并产生力学破坏形成中心熔融四周断裂的损伤针点。7.6 ns激光作用下只有一种前驱体吸收激光能量,并且形成的损伤针点与850 ps对应的损伤针点有相同特征。
  • 图  1  激光损伤阈值测试实验平台

    Figure  1.  Experiment platform for laser damage threshold test

    图  2  CCD在线拍摄的损伤针点He-Ne光散射图片

    Figure  2.  He-Ne light scatter image of pinpoint before and fter damage observed by CCD monitor

    图  3  DKDP晶体在不同脉宽3ω激光作用下损伤概率曲线

    Figure  3.  Damage probability for DKDP crystals under 3ω laser with different pulse duration and energy density

    图  4  DKDP晶体在355 nm脉冲激光作用下35 ps, 850 ps和7.6 ns所对应的损伤针点密度

    Figure  4.  Pinpoint density versus fluence for DKDP crystals under 355 nm pulse duration with 35 ps, 850 ps and 7.6 ns

    图  5  显微镜下三种脉宽3ω激光作用下DKDP晶体内的损伤针点形貌

    Figure  5.  Morphologies of three kinds of laser induced bulk damage pinpoints observed by microscope

    图  6  9.2 J/cm2能量密度下7.6 ns脉宽对应的损伤针点图像

    Figure  6.  Morphologies of laser induced bulk damage pinpoints by 3ω, 7.6 ns shot at 9.2 J/cm2 observed by microscope and SEM

    图  7  不同脉宽3ω激光作用下损伤针点中心点平均直径

    Figure  7.  Central point mean diameter of different pulse duration pinpoints

    图  8  拟合计算得到的损伤概率曲线与实测损伤概率

    Figure  8.  Different pulse duration damage probability fitting curve and measured value

    表  1  不同脉宽作用下DKDP晶体的阈值

    Table  1.   DKDP crystal LIDT of different pulse duration

    pulse duration/ns laser induced damage threshold/(J·cm-2)
    0.035 0.3
    0.850 2.2
    7.600 3.2
    下载: 导出CSV

    表  2  DKDP晶体不同脉宽3ω激光所对应的前驱体

    Table  2.   Damage precursors of DKDP crystals under 3ω laser with different pulse duration

    pulse duration/ns precursor density ρi/mm-3 mean LIDT Ti/(J·cm-2) LIDT standard deviation ΔTi/(J·cm-2)
    0.035 386.5 0.4 0.03
    0.850 0.1 2.2 0.02
    4.6 4.7 0.30
    7.600 4.2 6.4 3.10
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-05-15
  • 修回日期:  2019-06-18
  • 刊出日期:  2019-09-15

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