A theoretical analysis is made of small-scale distortions of the scattered wave formed during wavefront reversal in stimulated Brillouin backscattering of a pump beam consisting of a strong plane wave and interfering components with an extended angular spectrum. The relative value of the distortions is mainly determined by the small parameter g/k θ 2 ( g is the gain in reciprocal centimeters, k is the wave number, and θ is the angular divergence). An investigation is made of the conditions when the addition of a plane wave to the wave with an extended angular spectrum improves and causes a deterioration in the quality of the small-scale wavefront reversal.
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Zel'dovich et al. (1980) studied this question.
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