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24 February 2009 Dynamics of femtosecond laser-induced breakdowns in water
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Time-resolved phase distributions of laser-induced breakdowns generated by two pulses in water are observed with a pump-probe interference microscope. When the two pulses are overlapping temporally, the optical interference of the two pulses are resulted in fluctuation of pulse energy used to breakdown. When shock waves emitted from breakdowns are overlapped, the pressure of overlapping point is addition of the pressure of each shock wave. When two pulse is overlapping spatially, even temporally separated, a nonlinear enhancement of shock wave is observed. It may be caused by an interaction between a plasma and a post pulse.
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A. Takita and Y. Hayasaki "Dynamics of femtosecond laser-induced breakdowns in water", Proc. SPIE 7201, Laser Applications in Microelectronic and Optoelectronic Manufacturing VII, 72010J (24 February 2009);

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