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Effect of defects on long-pulse laser-induced damage of two kinds of optical thin films

机译：缺陷对两种光学薄膜对长脉冲激光损伤的影响

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摘要

In order to study the effect of defects on the laser-induced damage of different optical thin films, we carried out damage experiments on two kinds of thin films with a 1 ms long-pulse laser. Surface-defect and subsurface-defect damage models were used to explain the damage morphology. The two-dimensional finite element method was applied to calculate the temperature and thermal-stress fields of these two films. The results show that damages of the two films are due to surface and subsurface defects, respectively. Furthermore, the different dominant defects for thin films of different structures are discussed.
机译：为了研究缺陷对不同光学薄膜的激光损伤的影响，我们用1 ms长脉冲激光对两种薄膜进行了损伤实验。使用表面缺陷和次表面缺陷损伤模型来解释损伤形态。应用二维有限元方法计算了这两层薄膜的温度和热应力场。结果表明，两种膜的损伤分别是由于表面和表面缺陷造成的。此外，讨论了不同结构薄膜的不同主要缺陷。

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