Calculation of Threshold Dependence of Laser induced Damage upon Pulse Duration

MA Guo-Bin; TAN Wei-Han; WANG Zhan-Shan

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Calculation of Threshold Dependence of Laser induced Damage upon Pulse Duration

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- Calculation of Threshold Dependence of Laser induced Damage upon Pulse Duration
- Optics and Precision Engineering Vol. 6, Issue 3, Pages: 22-27(1998)
- 作者机构：
  
  1. 中国科学院长春光学精密机械研究所, 长春 130022
  2. 上海大学物理系上海,201800
  3. 中国科学院上海光学精密机械研究所, 上海 201800
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 October 1997，
  
  Revised：31 March 1998，
  
  Published Online：15 June 1998，
  
  Published：15 June 1998
- 稿件说明：
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马国斌, 谭维翰, 王占山. 激光辐射损伤阈值与激光脉宽相互关系的模拟计算[J]. 光学精密工程, 1998,(3): 22-27

MA Guo-Bin, TAN Wei-Han, WANG Zhan-Shan,. Calculation of Threshold Dependence of Laser induced Damage upon Pulse Duration[J]. Editorial Office of Optics and Precision Engineering, 1998,(3): 22-27
马国斌, 谭维翰, 王占山. 激光辐射损伤阈值与激光脉宽相互关系的模拟计算[J]. 光学精密工程, 1998,(3): 22-27 DOI：

MA Guo-Bin, TAN Wei-Han, WANG Zhan-Shan,. Calculation of Threshold Dependence of Laser induced Damage upon Pulse Duration[J]. Editorial Office of Optics and Precision Engineering, 1998,(3): 22-27 DOI：

摘要

描述了一个超短脉冲引起的电介质激光损伤的理论模型

这个模型考虑了多光子电离、雪崩电离、电子-离子复合和电子扩散。通过假设激光脉冲为高斯型

数值计算得到了激光脉冲宽度与激光辐射损伤间的依赖关系。对于大于10ps的脉冲宽度

数值结果与平方根关系符合很好

对于亚皮秒激光脉冲

通过适当选择损伤的评价标准

我们的模型解释了Du等和Stuart等的相对实验结果。

Abstract

A theoretical model is developed to describe the process of laser induced damage of dielectrics with ultrashort pluses

in which the multiphoton ionization

avalanche ionization

electron ion recombination

and the electron diffusion are taken into account.By assuming a Gaussian temporal shape of laser pulse

some numerical results of the threshold dependence on pulse duration are presented.For pulse length longer than 10ps

the numerical results agree well with the square root relation.For pulse length of subpicosecond

our model principally explains the opposite experimental results of Du et al's (Appl.Phys.Lett.

3071(1994)and Stuart el al's (Phys.Rev.Lett

2248(1995) by properly choosing the criterion of damage.

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Related Institution

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