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Multicomponent photorefractive solitons

New class of stable multicomponent self-consistent light field distributions is presented by the example of a problem of nonlinear wave propagation through a photorefractive crystal with drift nonlinear response. Exact analytical expressions for light field distributions of the components of such periodical solutions, which include up to three mutually incoherent light field components, have been obtained. It has been shown that such cnoidal waves are stable and their spatial structure is robust to collisions with the same cnoidal waves and to stochastic perturbations of the intensity.