Stimulated Raman backscattering instability in short pulse laser interaction with helium gas (original) (raw)

Physics of Plasmas, 1996

Abstract

Experimental and theoretical results on the stimulated Raman backscattering (SRS) reflectivity of a short laser pulse (120 fs) interaction with an optically ionized helium gas are presented. The reflectivity is measured as a function of the gas pressure from 1 to 100 Torr. A monodimensional (1-D) theoretical model, including the refraction induced during the ionization process, describes the dependence of

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