2 October 1998 Salt water for optical breakdown laser-generated sound
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Abstract
One possibility for communicating from an airplane above water surface to submarinein sea involves the use of laser-generated sound. In previous work, optical breakdown laser-acoustic pulses in fresh water have been studied and in intense sound source has been excited. In this paper, five kinds of salt water having salinities 1.3%, 2.6%, 3.9%, 5.2% and 6.5% (max salinity of seawater near 4.0%), have been broken down to generate underwater acoustic pulse signals by Q-switched YAG- Nd laser with different pulse energies. After detail analyzing both in time domain and frequency domain, the fact that the salinity of water does not have much influence on laser- acoustic pulse signal would be found. Also, some slight but interesting differences due to different salinity are introduced.
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Duo-Min He, Duo-Min He, Anand Krishna Asundi, Anand Krishna Asundi, } "Salt water for optical breakdown laser-generated sound", Proc. SPIE 3464, Optical Devices and Methods for Microwave/Millimeter-Wave and Frontier Applications, (2 October 1998); doi: 10.1117/12.323151; https://doi.org/10.1117/12.323151
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