Abstract
Stimulated Brillouin scattering (SBS) in a backward direction serves for many years as an effective tool of self-phase conjugation (PC) for giant laser pulses.1,2 Recently an alternative type of the stimulated backscattering—the stimulated diffusion scattering (SDS) in photorefractive crystals—has been proposed to be used for PC of low power radiation.3,4 Both effects can be reduced, in principle, to a two-wave mixing of an incident pump wave to be conjugated and of waves that are seeding in a backward direction usually by spontaneous scattering of the same pump wave by randomly distributed small-scale inhomogeneities of a medium (Fig. 1).
© 1994 IEEE
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