Underwater acoustic wave generation by filamentation of terawatt ultrashort laser pulses.

  title={Underwater acoustic wave generation by filamentation of terawatt ultrashort laser pulses.},
  author={Vytautas Jukna and Amelie Jarnac and Carles Mili{\'a}n and Yohann Brelet and J{\'e}r{\^o}me Carbonnel and Y. B. Andre and R'egine Guillermin and Jean-Pierre Sessarego and Dominique Fattaccioli and Andr{\'e} Mysyrowicz and Arnaud Couairon and A. Houard},
  journal={Physical review. E},
  volume={93 6},
Acoustic signals generated by filamentation of ultrashort terawatt laser pulses in water are characterized experimentally. Measurements reveal a strong influence of input pulse duration on the shape and intensity of the acoustic wave. Numerical simulations of the laser pulse nonlinear propagation and the subsequent water hydrodynamics and acoustic wave generation show that the strong acoustic emission is related to the mechanism of superfilamention in water. The elongated shape of the plasma… 

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