Abstract
A key aspect in underwater communications and detection is the ability to generate and control remote acoustic sources [1]. An attractive scenario in this context is the generation of such sources via the optical filaments resulting from laser pulses focused down in water. This is because variable focusing conditions and input pulse parameters such as chirp offer a relatively rich control on the amount of deposited energy and shape of the excited plasma volume [2]. We study by means of numerical simulations the impact that different plasma volume geometries have on the spatial distribution of the acoustic waves. Optical filamentation is simulated by means of a nonlinear unidirectional pulse propagation equation [2,3] and the acoustic waves by means of the compressible Euler equations [4].
© 2015 IEEE
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