| 超短脉冲激光对透明介质的烧蚀特性研究 |
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| 引用本文： | 魏要丽,张伟,彭玉峰,吕珍龙,樊晓伟.超短脉冲激光对透明介质的烧蚀特性研究[J].河南师范大学学报(自然科学版),2005,33(1):45-48. |
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| 作者姓名： | 魏要丽 张伟 彭玉峰 吕珍龙 樊晓伟 |
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| 作者单位： | 1. 河南师范大学,物理与信息工程学院,河南,新乡,453007
2. 平顶山教育学院,物理系,河南,平顶山,467000 |
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| 基金项目： | 河南省高校杰出科研人才创新工程项目(2003KYCX005) |
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| 摘 要： | 用波长800 nm,脉宽分别为20 fs,100 fs,1 000 fs高斯型激光脉冲研究熔石英的烧蚀机制,采用一种新的模型来计算烧蚀过程中电子数密度随时间的演化,同时确定了不同情况下材料的烧蚀阈值,并分析了在这个过程中多光子电离,隧道电离及雪崩电离的作用,本文结果与以前研究结果符合得较好.
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| 关 键 词： | 飞秒激光 物质破坏 烧蚀机制 非线性吸收 |
| 文章编号： | 1000-2367(2005)01-0045-04 |
| 修稿时间： | 2004年7月5日 |
Theoretical Study of Femtosecond Laser-Induced Ablation in Dielectrics |
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| WEI Yao-li,ZHANG Wei,PENG Yu-feng,LV Zhen-long,FAN Xiao-wei.Theoretical Study of Femtosecond Laser-Induced Ablation in Dielectrics[J].Journal of Henan Normal University(Natural Science),2005,33(1):45-48. |
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| Authors: | WEI Yao-li ZHANG Wei PENG Yu-feng LV Zhen-long FAN Xiao-wei |
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| Institution: | WEI Yao-li~1,ZHANG Wei~2,PENG Yu-feng~1,LV Zhen-long~1,FAN Xiao-wei~1 |
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| Abstract: | A new method was used to investigate the ablation mechanisms by 20 fs,100 fs,1 000 fs Gaussian laser pulses at a wavelength of 800 nm and the electron evolution was calculated in this paper. By analyzing the theoretical calculations, the ablation thresholds were predicted and the respective roles of multiphoton ionization, tunneling ionization, and avalanche ionization in femtosecond laser-induced damage were also examined. It is found that the present results are in quantitative agreement with the previous studies. |
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| Keywords: | femtosecond laser material damage ablation mechanism nonlinear absorption |
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