摘要
分析了激光脉冲能量与激光声特性的对应关系。采用脉冲能量可调的Nd：YAG激光器产生激光声信号，利用水听器测量激光声信号。结果表明，激光脉冲能量在70～300mJ范围内变化时，随着激光脉冲能量的增加，激光声信号峰值声压具有线性增加的趋势，等离子体膨胀声波与空泡溃灭声波的时间间隔也相应增加，等离子体膨胀声波的峰值声压比空泡溃灭声波的峰值声压低，激光声信号的主频与脉冲能量的对应关系较弱。
The coincidence relation between laser pulse energy and hydroacoustic specialty was analyzed. Achromatic aberration lens system, Nd： YAG laser which pulse energy is adjustable, a hydrophone and a digital oscilloscope are used to generate and record laser induced hydroacoustic signal. The conclusions as follows：First,when the pulse energy increases within the range from 70mJ to 300mJ, the peak pressures of laser-induced hydroacoustic linearly increase,the interval between plasma expanding induced hydroacoustic and bubble collapse induced hydroacoustic increase correspondingly. Second, the peak pressure of bubble collapse induced hydroacoustic is higher than that of plasma expanding induced hydroacoustic. Third, there is a weak relation between the frequency of laser induced hydroacoustic and laser pulse energy.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第10期981-983,共3页
Laser & Infrared
基金
武器装备预研基金项目(No.51400010105JB1101)
武器装备预研重点基金项目(No.9140A14060207JB11)资助
关键词
脉冲能量
声特性
对应关系
pulse energy
hydroacoustic specialty
coincidence relation
