Calculations of the accuracy of wavefront reversal utilizing pump radiation with one-dimensional transverse modulation

The problem of wavefront reversal in stimulated Brillouin backscattering in a pump field with onedimensional transverse modulation for the reversing mode of the scattered field is considered. Calculations are made of corrections corresponding to "serpentine" distortions. The fraction of these distortions is ~xln(1/x), where x =g/kθ² is the product of the gain g (in reciprocal centimeters) and of the Fresnel length (kθ)^–1 of a pump field with the divergence θ. Specific differences between the one-dimensional and twodimensional problems are discussed.