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Pump Replication In Stimulated Raman Scattering Using A Crossed-Beam Geometry

A theory of side beam replication in a crossing-beam geometry is reported. It is shown that side beam replication is not expected to occur when the Fresnel number of the aberrations (FNA) is large, while it is expected to occur when FNA is small, in accord with experiments. An analytic threshold is derived for the value of FNA at which side beam replication no longer occurs, and this threshold agrees well with the experiments. We propose a method for eliminating side beam replication at low values of FNA.