| 激光打孔用声光调Q阶跃脉冲Nd:YAG激光器 |
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| 引用本文： | 郑义军,李强,刘长娥,张阔海,王志敏,左铁钏. 激光打孔用声光调Q阶跃脉冲Nd:YAG激光器[J]. 北京工业大学学报, 2003, 29(2): 218-220 |
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| 作者姓名： | 郑义军 李强 刘长娥 张阔海 王志敏 左铁钏 |
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| 作者单位： | 北京工业大学,激光工程研究院,北京,100022 |
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| 基金项目： | 国防重点实验室基金;; |
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| 摘 要： | 针对高质量激光打孔的应用要求,设计了一种高峰值功率脉冲激光器。采用声光器件对脉冲Nd:YAG激光进行了腔内调制,提高了激光脉冲的峰值功率。给出了激光器的结构、脉冲调Q的时序。获得了脉宽200ns的激光脉冲列,脉冲列的重复频率为(5～50)kHz,脉冲能量为30～80mJ,脉冲峰值功率为400kW,输出激光束的光束质量为3mm·mrad,并对飞机发动机燃烧室用1.5mm厚镍基高温合金进行打孔实验,获得了再铸层薄和微裂纹少的微孔。
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| 关 键 词： | 脉冲激光 声光调Q Nd:YAG激光器 激光打孔 |
| 文章编号： | 0254-0037(2003)02-0218-03 |
| 修稿时间： | 2002-10-29 |
Pulse Nd:YAG Laser for Drilling Modulated by Acousto-optic Q-switch |
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| ZHENG Yi-jun,LI Qiang,LIU Chang-e,ZHANG Kuo-hai,WANG Zhi-min,ZUO Tie-chuan. Pulse Nd:YAG Laser for Drilling Modulated by Acousto-optic Q-switch[J]. Journal of Beijing Polytechnic University, 2003, 29(2): 218-220 |
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| Authors: | ZHENG Yi-jun LI Qiang LIU Chang-e ZHANG Kuo-hai WANG Zhi-min ZUO Tie-chuan |
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| Abstract: | According to the application requirement of high-quality drilling, the authors design a novel high peak-power acousto-optical Q-switched pulse Nd:YAG laser. AOM is used in cavity to modulate pulse Nd:YAG laser for improving peak-power of laser pulse. The set-up and Q-switching pulse sequence of laser are given. The Q-switch pulse train of laser with the duration of 200 ns during each flash-lamp pulse is obtained. The repetition rate of the train is (5-50)kHz, the pulse energy is 30~ 80 mJ, and the peak power is more than 400 kW with an output beam parameter product of about 3 mm mrad. The laser has been used to drill the Ni-alloy of 1.5 mm thick, resulting in thinner recast layer and less micro cracks. |
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| Keywords: | pulse laser acousto-optic Q-switch Nd:YAG laser laser drilling |
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