中国物理B ›› 2010, Vol. 19 ›› Issue (10): 106105-106105.doi: 10.1088/1674-1056/19/10/106105

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Laser-induced damage on large-aperture fused silica gratings

韩伟, 黄晚晴, 王芳, 李恪宇, 冯斌, 李富全, 景峰, 郑万国   

  1. Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2010-01-13 修回日期:2010-04-20 出版日期:2010-10-15 发布日期:2010-10-15

Laser-induced damage on large-aperture fused silica gratings

Han Wei(韩伟)†, Huang Wan-Qing(黄晚晴), Wang Fang(王芳), Li Ke-Yu(李恪宇), Feng Bin(冯斌), Li Fu-Quan(李富全), Jing Feng(景峰), and Zheng Wan-Guo(郑万国)   

  1. Research Centre of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2010-01-13 Revised:2010-04-20 Online:2010-10-15 Published:2010-10-15

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摘要： Two sets of laser-damage experiments on large-aperture fused silica optics have been carried out in a high-power laser facility. Severe damage has been found on the grating which presented dense craters on the front surface. This phenomenon is quite different from other fused silica optics, which are damaged on the rear surface. The damage possibility due to the redeposition layer was ruled out by acid-etching the grating's front surface. The remarkable stimulated Brillouin scattering (SBS) effect was observed in grating and the reason for the front surface damage is thought to be the backward SBS.

Abstract: Two sets of laser-damage experiments on large-aperture fused silica optics have been carried out in a high-power laser facility. Severe damage has been found on the grating which presented dense craters on the front surface. This phenomenon is quite different from other fused silica optics, which are damaged on the rear surface. The damage possibility due to the redeposition layer was ruled out by acid-etching the grating's front surface. The remarkable stimulated Brillouin scattering (SBS) effect was observed in grating and the reason for the front surface damage is thought to be the backward SBS.

Key words: laser-induced damage, grating, Beilby layer, stimulated Brillouin scattering

中图分类号:  (Stimulated Brillouin and Rayleigh scattering)

  • 42.65.Es
42.79.Dj (Gratings) 61.80.Ba (Ultraviolet, visible, and infrared radiation effects (including laser radiation)) 61.82.Ms (Insulators) 81.65.Cf (Surface cleaning, etching, patterning)