Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Study on the near field modulation and laser induced damage of beam sampling grating

Wen Sheng-Lin Yao Xin Gao Fu-Hua Li Jian-Feng Zhang Yi-Xiao Guo Yong-Kang

Study on the near field modulation and laser induced damage of beam sampling grating

Wen Sheng-Lin, Yao Xin, Gao Fu-Hua, Li Jian-Feng, Zhang Yi-Xiao, Guo Yong-Kang
PDF
Get Citation
Metrics
  • Abstract views:  2979
  • PDF Downloads:  918
  • Cited By: 0
Publishing process
  • Received Date:  16 November 2007
  • Accepted Date:  25 February 2008
  • Published Online:  20 August 2008

Study on the near field modulation and laser induced damage of beam sampling grating

  • 1. (1)成都精密光学工程研究中心,成都 610041; (2)四川大学物理科学与技术学院,成都 610064

Abstract: The beam sampling grating (BSG) is one kind of important diffractive optical elements which is used in sampling and diagnosis. In terminal optical system of the inertial confinement fusion (ICF) system, the modulation produced by strong laser in the near field, may cause laser induced damage to the BSG. It makes the element work abnormally. In order to provide the theoretical basis for protecting this kind of optical element from laser induced damage under the strong laser condition, this paper uses the Fourier modal theory to carry on the numerical simulation of the interior modulation for BSG in near field. The results indicate that the interior modulation of BSG is weak, but the optical field distribution is still not even, thus in these areas the damage probability is higher than in other positions. Moreover, through the fabrication error analysis of BSG, the relationship between modulation in near field and fabrication error was obtained. The computed results indicate that the depth error and the duty cycle error of grooves affect the modulation of the light beam in near field, but the influence of groove depth error is larger than the duty cycle error. However, if the groove depth error does not exceed a definite value, its modulation also remains on a lower level. Therefore the BSG can still work in the ICF driver normally.

Catalog

    /

    返回文章
    返回