| 超短脉冲激光对透明材料的破坏 |
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| 引用本文： | 马法君,田友伟,何峰,陆培祥.超短脉冲激光对透明材料的破坏[J].激光技术,2005,29(5):507-510. |
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| 作者姓名： | 马法君 田友伟 何峰 陆培祥 |
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| 作者单位： | 1.中国科学院, 上海光学精密机械研究所, 强光光学重点实验室, 上海, 201800; |
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| 基金项目： | 国家自然科学基金资助项目(10375083)，国家重点基础研究专项基金资助项目(TG1999075206-2) |
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| 摘 要： | 基于固体的能带理论和能量守恒原理建立了一个描述激光与非金属材料作用时载流子随时间空间变化的理论模型。讨论了材料的破坏阈值、烧蚀深度与激光脉宽、波长和强度之间的关系,同时也讨论了破坏阈值、烧蚀深度与材料禁带宽度等特性之间的关系。讨论了多光子电离、隧道电离和雪崩电离在激光对材料破坏过程中的不同地位,理论结果表明,光电离在超短脉冲激光对非金属材料破坏过程中对破坏阈值的影响最大。
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| 关 键 词： | 光学材料 激光破坏 破坏阈值 烧蚀深度 |
| 文章编号： | 1001-3806(2005)05-0507-04 |
| 收稿时间： | 2004-06-15 |
| 修稿时间： | 2004-09-29 |
Ultra-short pulse laser-induced damage in transparent materials |
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| MA Fa-jun , TIAN You-wei ,HE Feng ,LU Pei-xiang.Ultra-short pulse laser-induced damage in transparent materials[J].Laser Technology,2005,29(5):507-510. |
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| Authors: | MA Fa-jun TIAN You-wei HE Feng LU Pei-xiang |
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| Affiliation: | 1. Shanghai Institute of Optics and Fine Mechanics, the Chinese Academy of Sciences, Shanghai 201800, China; 2. National Laboratory of Laser Technology, HUST, Wuhan 430074, China |
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| Abstract: | A theoretical model based on solid state energy band theory and energy conservation is developed which can describe temporal and spatial distribution of carriers in nonmetal materials during laser-induced damage.The relation between damage threshold,ablation depth and laser pulse duration,wavelength,energy fluence is studied with the model.The effects of the electronic properties of material on damage threshold and ablation depth are also discussed.The respective roles of multi-photon ionization,tunnel ionization,and avalanche ionization in laser induced damage are examined,and it is found that photo-ionization is always the most important role in the nonmetal materials during ultra-short laser induced damage. |
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| Keywords: | optical material laser-induced damage damage threshold ablation depth |
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