Pulsed laser induced acoustic wave propagation and interaction in liquid: experiment and simulation

Sang Gil Ryu; Seung Hwan Ko; Nipun Misra; Heng Pan; Costas P. Grigoropoulos; Nick Kladias; Elias Panides; Gerald A. Domoto

doi:10.1117/12.764314

11 March 2008 Pulsed laser induced acoustic wave propagation and interaction in liquid: experiment and simulation

Sang Gil Ryu, Seung Hwan Ko, Nipun Misra, Heng Pan, Costas P. Grigoropoulos, Nick Kladias, Elias Panides, Gerald A. Domoto

Author Affiliations +

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 68561A (2008) https://doi.org/10.1117/12.764314
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

In-situ experimental work on laser induced pressure waves in water is presented in this paper. A double frequency Nd:YAG laser(532 nm, 4 ns pulse width) was irradiated on a chromium thin film on quartz substrate in contact with water. A plane pressure wave with high temporal and spatial resolution was generated by the laser induced thermoelastic stress around 8~12 mJ/cm² below the regime of shock wave generation. The pressure wave was observed to propagate at the speed of sound in water. The plane acoustic wave could be interacted and focused with solid structures. FEM numerical simulations of the aforementioned phenomena are also carried out to solve the 2D transient wave equation and compared with the experimental results.

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Sang Gil Ryu, Seung Hwan Ko, Nipun Misra, Heng Pan, Costas P. Grigoropoulos, Nick Kladias, Elias Panides, and Gerald A. Domoto "Pulsed laser induced acoustic wave propagation and interaction in liquid: experiment and simulation", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68561A (11 March 2008); https://doi.org/10.1117/12.764314

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KEYWORDS

Acoustics

Wave propagation

Liquids

Pulsed laser operation

Nd:YAG lasers

Numerical simulations

Thin films

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