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首页> 外文会议>2015 International Conference on Optical Instruments and Technology: Advanced Lasers and Applications >Characteristics and Mechanism of Laser-induced Surface Damage Initiated by Metal Contaminants
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Characteristics and Mechanism of Laser-induced Surface Damage Initiated by Metal Contaminants

机译：金属污染物引起的激光诱导的表面损伤的特征和机理

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摘要

In high power laser facility, contaminants on optics surfaces reduce damage resistance of optical elements and then decrease their lifetime. By damage test experiments,laser damage induced by typical metal particles such as stainless steel 304 is studied. Optics samples with metal particles of different sizes on surfaces are prepared artificially based on the file and sieve.Damage test is implemented in air using a 1-on-1 mode.Results show that damage morphology and mechanism caused by particulate contamination on the incident and exit surfaces are quite different. Contaminants on the incident surface absorb laser energy and generate high temperature plasma during laser irradiation which can ablate optical surface.Metal particles melt and then the molten nano-particles redeposit around the initial particles.Central region of the damaged area bears the same outline as the initial particle because of the shielding effect. However,particles on the exit surface absorb a mass of energy,generate plasma and splash lots of smaller particles,only a few of them redeposit at the particle coverage area on the exit surface.Most of the laser energy is deposited at the interface of the metal particle and the sample surface, and thus damage size on the exit surface is larger than that on the incident surface.The areas covered by the metal particle are strongly damaged.And the damage sites are more serious than that on the incident surface.Besides,damage phenomenon also depends on coating and substrate materials.
机译：在高功率激光设备中，光学器件表面上的污染物会降低光学元件的抗损坏性，从而缩短其使用寿命。通过损伤试验实验，研究了由典型金属颗粒如不锈钢304引起的激光损伤。根据锉刀和筛子人工制备表面具有不同大小金属颗粒的光学样品，在空气中以1对1模式进行损伤测试，结果表明由入射和发射过程中颗粒污染引起的损伤形态和机理出口表面完全不同。入射表面上的污染物吸收激光能量并在激光照射过程中产生高温等离子体，从而烧蚀光学表面，金属颗粒熔化，然后熔融的纳米颗粒重新沉积在初始颗粒周围。初始粒子由于具有屏蔽作用。但是，出射表面上的粒子会吸收大量的能量，产生等离子体并飞溅出许多较小的粒子，只有其中的一些会重新沉积在出射表面上的粒子覆盖区域。大部分激光能量会沉积在出射面的界面上。金属颗粒和样品表面，因此出射表面的损伤尺寸大于入射表面的损伤尺寸，金属颗粒覆盖的区域受到了严重破坏，损伤部位比入射表面的损伤部位严重。 ，损坏现象还取决于涂层和基材材料。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    Shuang Shi; Mingying Sun; Shuaixu Shi; Zhaoyan Li; Ya-nan Zhang; Zhigang Liu;

  • 作者单位

    School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China,National Laboratory on High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

    National Laboratory on High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

    National Laboratory on High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

    School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China,National Laboratory on High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

    School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China;

    National Laboratory on High Power Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser damage; contaminant; metal particle; incident and exit surface; damage morphology;

    机译：激光伤害；污染物金属颗粒入射和出射面；损伤形态;

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