Stimulated Brillouin back-scattering at relativistic laser power

Saleh T. Mahmoud

doi:10.1088/0031-8949/76/3/009

Stimulated Brillouin back-scattering at relativistic laser power

Saleh T. Mahmoud

Department of Physics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The effect of ultra intense laser beam filaments on stimulated Brillouin scattering (SBS) has been investigated in collisionless and unmagnetized plasma when relativistic and ponderomotive nonlinearities are operative. The pump depletion and self-focusing effects of the pump and backscattered laser beams are taken into account in three dimensions within the paraxial ray approximations. It is found that Brillouin back-reflectivity decreases when ponderomotive and relativistic nonlinearities are operative. Integrated reflectivity is found to exhibit a maximum value at optimum SBS gain when the self-focusing effect is taken into account. The SBS back-reflectivity continuously increases with G_SBS when the self-focusing effect is excluded. The reflectivity with pump depletion is less than without pump depletion.

Original language	English
Article number	009
Pages (from-to)	259-263
Number of pages	5
Journal	Physica Scripta
Volume	76
Issue number	3
DOIs	https://doi.org/10.1088/0031-8949/76/3/009
Publication status	Published - Sept 1 2007

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Mathematical Physics
Condensed Matter Physics
Physics and Astronomy(all)

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10.1088/0031-8949/76/3/009

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abstract = "The effect of ultra intense laser beam filaments on stimulated Brillouin scattering (SBS) has been investigated in collisionless and unmagnetized plasma when relativistic and ponderomotive nonlinearities are operative. The pump depletion and self-focusing effects of the pump and backscattered laser beams are taken into account in three dimensions within the paraxial ray approximations. It is found that Brillouin back-reflectivity decreases when ponderomotive and relativistic nonlinearities are operative. Integrated reflectivity is found to exhibit a maximum value at optimum SBS gain when the self-focusing effect is taken into account. The SBS back-reflectivity continuously increases with GSBS when the self-focusing effect is excluded. The reflectivity with pump depletion is less than without pump depletion.",

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AB - The effect of ultra intense laser beam filaments on stimulated Brillouin scattering (SBS) has been investigated in collisionless and unmagnetized plasma when relativistic and ponderomotive nonlinearities are operative. The pump depletion and self-focusing effects of the pump and backscattered laser beams are taken into account in three dimensions within the paraxial ray approximations. It is found that Brillouin back-reflectivity decreases when ponderomotive and relativistic nonlinearities are operative. Integrated reflectivity is found to exhibit a maximum value at optimum SBS gain when the self-focusing effect is taken into account. The SBS back-reflectivity continuously increases with GSBS when the self-focusing effect is excluded. The reflectivity with pump depletion is less than without pump depletion.

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Stimulated Brillouin back-scattering at relativistic laser power

Abstract

ASJC Scopus subject areas

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