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

François Walraet | Zendy; G. Bonnaud | Zendy; G. Riazuelo | Zendy

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

Author(s) -

François Walraet,

G. Bonnaud,

G. Riazuelo

Publication year - 2001

Publication title -

physics of plasmas

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.75

H-Index - 160

eISSN - 1089-7674

pISSN - 1070-664X

DOI - 10.1063/1.1405128

Subject(s) - physics , speckle pattern , paraxial approximation , filamentation , plasma , optics , beam (structure) , smoothing , laser , computational physics , quantum mechanics , computer science , computer vision

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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