16 September 2014 Generation of shock waves in a medium with absorbing particles
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Focusing the continuous laser radiation on the water with absorbing particles results in the emergence of shock waves and medium blooming periodic in time. The illuminating beam diameter growth at the constant laser power results in the decrease of the signals’ modulation frequency, improving their stability and increasing their amplitudes. The decrease of signal’s modulation frequency is caused by the growth of time, which is needed for heating the medium to the critical temperature. Improving the stability and the increase of optical and acoustic signals’ amplitudes take place due to the growth of the number of particles participating in cavitation.
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Oleg V. Angelsky, Vira R. Besaga, Andrew P. Maksimyak, Peter P. Maksimyak, "Generation of shock waves in a medium with absorbing particles", Proc. SPIE 9164, Optical Trapping and Optical Micromanipulation XI, 91642N (16 September 2014); doi: 10.1117/12.2060667; https://doi.org/10.1117/12.2060667

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