透明液体中激光致声特性

计算物理 ›› 2010, Vol. 27 ›› Issue (2): 257-262.

透明液体中激光致声特性

王雨虹, 王江安, 吴荣华

武汉海军工程大学电子工程学院光电研究所, 湖北武汉 430033

收稿日期:2009-01-05 修回日期:2009-06-15 出版日期:2010-03-25 发布日期:2010-03-25
作者简介:王雨虹(1974-),男,河北南富,博士生,从事激光击穿透明液体声特性研究.

Laser Induced Sound in Transparent Liquids

WANG Yuhong, WANG Jiang'an, WU Ronghua

College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China

Received:2009-01-05 Revised:2009-06-15 Online:2010-03-25 Published:2010-03-25

摘要/Abstract

摘要： 研究透明液体的特性阻抗、激光声的传播距离和激光焦斑半径对激光声信号的影响.通过实验和数值计算发现,在一定范围内,随着特性阻抗的增加,声波的峰值声压、主频和声能也相应增加;随着激光声传播距离的增加,激光声的主频从急速下降变为相对稳定;在保证光击穿的条件下,选择较大的激光焦斑半径,可提高光声能量转换效率.

关键词: 透明液体, 激光致声, 特性阻抗, 传播距离, 焦斑半径

Abstract: Specific acoustic impedance of transparent liquid, sound transmitting distance of laser induced sound and laser beam waist radius are analyzed. It shows that the peak pressure, dominant frequency and energy of laser induced sound increase as specific acoustic impedance increases. The dominant frequency quickly drops in a short distance and then becomes a constant at a larger distance. Under the condition of optical breakdown, a high ratio of laser to sound energy conversion can be obtained with a large laser beam waist radius.

Key words: transparent liquid, laser induced sound, specific acoustic impedance, transmitting distance, beam waist radius

中图分类号:

王雨虹, 王江安, 吴荣华. 透明液体中激光致声特性[J]. 计算物理, 2010, 27(2): 257-262.

WANG Yuhong, WANG Jiang'an, WU Ronghua. Laser Induced Sound in Transparent Liquids[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2010, 27(2): 257-262.