| 光击穿机制下的光声能量转换效率 |
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| 引用本文： | 王晓宇,王江安,宗思光,刘涛.光击穿机制下的光声能量转换效率[J].强激光与粒子束,2013,25(3):579-582. |
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| 作者姓名： | 王晓宇 王江安 宗思光 刘涛 |
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| 作者单位： | 1.海军工程大学 电子工程学院,武汉 430033 |
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| 基金项目： | 国家高技术发展技术项目;装备预研基金项目 |
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| 摘 要： | 建立了激光声实验测量系统，利用脉冲激光聚焦击穿水介质产生声信号。由水听器将声信号转换成电信号并送入数字存储示波器，计算出声信号能量。对不同激光能量、激光聚焦位置和水体盐度下的光声能量转换效率进行了理论和实验研究。研究结果表明:随着激光能量的提高，能量转换效率逐渐减小；激光垂直水面入射时，随着激光聚焦深度的增加，能量转换效率会出现一次阶跃式变大，随后逐渐降低；等离子体对激光能量的吸收越充分，能量转换效率越高；水体盐度的变化对能量转换效率影响很小。
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| 关 键 词： | 激光技术 激光声 光击穿 光声能量转换效率 声信号 |
| 收稿时间： | 2012-04-23 |
Laser acoustic energy conversion efficiency in optical breakdown mechanism |
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| Wang Xiaoyu,Wang Jiang’an,Zong Siguang,Liu Tao.Laser acoustic energy conversion efficiency in optical breakdown mechanism[J].High Power Laser and Particle Beams,2013,25(3):579-582. |
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| Authors: | Wang Xiaoyu Wang Jiang’an Zong Siguang Liu Tao |
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| Affiliation: | 1.College of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China |
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| Abstract: | An experiment system for laser-induced acoustic signal has been built. Acoustic signal is induced by pulse laser focused into water. A hydrophone is used to receive and convert acoustic signal into electric signal. The energy of the acoustic signal is calculated. Laser acoustic energy conversion efficiency is theoretically and experimentally analyzed. The results are as follows: as laser energy increases, energy conversion efficiency decreases; the longer distance the laser travels before being focused, the smaller the energy conversion efficiency is; energy conversion efficiency increases as absorbed energy by plasma increases; water salinity has little influence on energy conversion efficiency. |
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