Effect of laser beam filamentation on coexisting stimulated Raman and Brillouin scattering

This paper presents the study of stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) when both of these processes are coexisting and pump laser beam initial power is more than filamentation threshold. On account of the ponderomotive nonlinearity, the pump laser beam gets fila...

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Bibliographic Details
Published in:Physics of plasmas 2013-10, Vol.20 (10)
Main Authors: Sharma, R. P., Vyas, Ashish, Kishor Singh, Ram
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
BRILLOUIN EFFECT
COMPARATIVE EVALUATIONS
LASER RADIATION
LIGHT TRANSMISSION
NONLINEAR PROBLEMS
PLASMA
PLASMA FILAMENT
PONDEROMOTIVE FORCE
RAMAN EFFECT
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Summary:This paper presents the study of stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) when both of these processes are coexisting and pump laser beam initial power is more than filamentation threshold. On account of the ponderomotive nonlinearity, the pump laser beam gets filamented, and both the scattering processes (SRS and SBS) get affected. Simultaneous presence of SRS and SBS (five wave interaction case) also affect the pump filamentation process due to pump depletion. Both the scattering processes (SRS and SBS) are enhanced due to filamentation of laser beam. Results are also compared with the three wave interaction case (either SRS or SBS) with and without filamentation.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4824738