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首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2009 >Relation research on laser-induced Shockwave and laser pulse in laser shock processing
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Relation research on laser-induced Shockwave and laser pulse in laser shock processing

机译：激波加工中激波和激波的关系研究

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When a short pulse of a Q-switched high-power laser hit surface of materials, laser energy would be absorbed rapidly, thus producing explosive vaporization, and almost at the same time a high-pressure shock wave was induced, called laser shock wave. This ultra-high pressure induced by high power laser had been applied in the fields of basic research and engineering application such as inertial confined fusion, laser shock processing, etc. Influence of variable laser power density on laser shock wave was studied in this paper. Influences of variation of laser wavelength and pulse duration on laser shock waves were also discussed in laser shock processing. Piezoelectric Polyvinylidene Fluoride (PVDF) transducer and TDS3052B Digital Oscilloscope were applied in our experiments to measure the piezoelectric wave of PVDF and the corresponding stress wave induced by laser in real time. Differences and relations between laser-induced Shockwave and laser pulse in laser shock processing were researched according to the obtained waves, and the detailed analyses of their causes were given based on the formation of laser-induced shock wave. The research results could have important implications for a better understanding of characteristics of laser shock wave and further studies into the interaction between high-power laser and materials.
机译：当Q开关大功率激光的短脉冲撞击材料表面时，激光能量将被迅速吸收，从而产生爆炸性的汽化，并且几乎同时引发了高压激波，称为激光激波。高功率激光产生的这种超高压已经应用于基础研究和工程应用领域，例如惯性约束聚变，激光冲击处理等。本文研究了可变激光功率密度对激光冲击波的影响。在激光冲击处理中还讨论了激光波长和脉冲持续时间的变化对激光冲击波的影响。在我们的实验中，使用了压电聚偏二氟乙烯（PVDF）传感器和TDS3052B数字示波器来实时测量PVDF的压电波和激光产生的相应应力波。根据所获得的波，研究了激光冲击波与激光脉冲在激光冲击加工中的区别和关系，并根据激光冲击波的形成，对其产生原因进行了详细的分析。研究结果可能对更好地了解激光冲击波的特性以及进一步研究大功率激光器与材料之间的相互作用具有重要意义。

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