Experimental research of cavitation effect induced by focused Nd:YAG laser pulse underwater based on high-speed photography

Authors :: Li ZhengJia Lü Tao
Source :: SCIENTIA SINICA Physica, Mechanica & Astronomica. 41:1241-1248
Publication Year :: 2011
Publisher :: Science China Press., Co. Ltd., 2011.
Abstract: 采用高速摄影术准确记录聚焦脉冲Nd:YAG 激光水下诱导空化泡动态变化进程, 同时采用针式水听器探测空泡闭合或等离子体膨胀时辐射的冲击波信号. 实验结果表明, 当针式水听器端面和聚焦点间距逐渐减小时, 相同实验条件下, 探测到的声学信号个数增多且信号强度增强. 激光脉冲结构、能量、脉宽等激光参数直接决定单个激光脉冲诱导空泡个数、形貌以及等离子体膨胀和空泡闭合时辐射的声学信号特性. 实验结果可为短脉冲激光在临床医学上的运用提供理论与实践支持.

Subjects :: Optics
Materials science
business.industry
High-speed photography
Cavitation
Nd:YAG laser
Underwater
business
Experimental research
Pulse (physics)

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