摘要
用ＹＡＧ脉冲激光在自来水中产生超声波，用丹麦制造的水听器接收水中声波，在示波器上显示其波形并分析了产生声波的机理及特征．结果表明，当光源的脉冲宽度为８ｎｓ时，在混响声场中接收到声脉宽约为２ｍｓ；而在自由场中为１～２μｓ．所以，在理想的情况下，声脉冲宽度应和光脉冲宽度同数量级．
The mechanism and feature of ultrasound waves produced by YAG pulsed laser in water are studied. A hydrophone made by B and K company of Demark is used to recieve the ultrasound waves and display the wave sighals. The acoustic pulse duration is about 2 ms in reverbcration sound field and between 1μs and 2 μs in a free sound field. hut the acoustic pulse duration should be equal to that of light.
出处
《陕西师大学报（自然科学版）》
CSCD
1995年第2期41-44,共4页
Journal of Shaanxi Normal University(Natural Science Edition)
关键词
光声效应
等离子体
光击穿
激光
超声波
photoacoustic effect
plasma
acoustic pulse duration
laser-induced liquid breakdown
