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Journal Articles Physics of Plasmas Year : 2001

Velocities of speckles in a smoothed laser beam propagating in a plasma

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Abstract

By means of three-dimensional simulations, the paraxial propagation of a laser beam in a nonlinear plasma modeled by ion-acoustic waves is examined. The beam speckles are smoothed by a one-dimensional transverse spectral dispersion technique. In the case of weak smoothing and when the incident speckle velocity is subsonic, the propagation in the plasma is found to exhibit an asymptotic speckle velocity and to enhance filamentation. With contrary conditions, it is found to reduce simply the speckle velocity.
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Dates and versions

cea-01709026 , version 1 (14-02-2018)

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François Walraet, Guy Bonnaud, Gilles Riazuelo. Velocities of speckles in a smoothed laser beam propagating in a plasma. Physics of Plasmas, 2001, 8, pp.4717 - 4720. ⟨10.1063/1.1405128⟩. ⟨cea-01709026⟩

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