摘要
研究了水下高功率激光击穿水介质形成单空泡及空泡辐射声波的特性,推导了激光空泡辐射声波信号在击穿近场、远场的特性模型。利用调QNd∶YAG激光聚焦水下击穿水介质产生空泡,采用高速摄像机、高频测量水听器对激光空泡的生长过程及辐射的声波信号进行了测量。实验结果与理论模型吻合,可为相关研究提供参考。
We present experimental investigation of the shock wave and cavitation bubble after optical breakdown in water with Nd：YAG laser pulses of 8ns. The experimental investigation of the laser-induced cavitation bubble expan- sion and collapse were done with high-speed video. The pressure acoustic signal generated by the cavitation bubble was detected with the high-frequency transducer. In general, good agreement was observed between the results of the calculations and the experimental data. It may serve as a tool for the optimization in the bubble study and applications.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第8期757-761,共5页
Laser & Infrared
基金
武器装备重点基金项目课题(No.9140A14060207JB11)资助
国防预研基金课题(No.51400010105JB1101)资助
关键词
高功率激光
激光空泡
高速摄像
声信号
high power laser
laser-induced bubble
high-Speed video
sound signal
