Lu Zhigang, Zhan Renjun, Wang Xiaoyu. Characteristics of laser-induced plasma acoustic signal[J]. Infrared and Laser Engineering, 2014, 43(9): 2844-2848.
| Citation:
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Lu Zhigang, Zhan Renjun, Wang Xiaoyu. Characteristics of laser-induced plasma acoustic signal[J]. Infrared and Laser Engineering, 2014, 43(9): 2844-2848.
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Characteristics of laser-induced plasma acoustic signal
- 1.
Military Transportation Department,Logistics University of CAPF,Tianjin 300309,China;
- 2.
Institude of Equipment Engineering,Engineering University of CAPF,Xi'an 710086,China;
- 3.
Department of Electronic Engineering,Naval University of Engineering,Wuhan 430033,China
- Received Date: 2014-01-21
- Rev Recd Date:
2014-02-25
- Publish Date:
2014-09-25
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Abstract
The experimental system for laser -induced acoustic signals had been built for research on characteristic of laser-induced plasma acoustic signals. Acoustic signals were produced by pulsed laser focusing into water. A hydrophone was used to receive the acoustic signals. A high speed camera was used to record the breakdown procession. Time and frequency domain of laser-induced plasma acoustic signals were studied. Its directivity and transmission characteristic were analyzed theoretically, and proven by experiment. The results are as follows: The pulse width of laser-induced plasma acoustic signals is about 20 s, its frequency width is 500 kHz and main frequency is 70 kHz. It transmits in all directions and decreases proportionally to 1/r, main frequency decreases as distance increases.
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