Spatial and spectral studies of stimulated Rayleigh scattering in a Kerr medium carried out near threshold reveal that propagation behavior of the incident laser beam drastically influences the scattering process. The filamentation increases the local field intensity, allowing stimulated scattering to start.The time-dependent feature of the filaments broadens the spectrum of scattering through cross-phase modulation. Understanding the roles of Kerr effects inall the generation processes of the large-bandwidth stimulated scattering requires taking into account the forward and backward competition.

© 1997 Optical Society of America

[Optical Society of America ]

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