Incoherently coupled Gaussian soliton pairs in biased centrosymmetric photorefractive crystals

The coupling between two mutually incoherent Gaussian beams that propagate collinearly in biased centrosymmetric photorefractive crystals is investigated. It is shown that incoherently coupled bright–bright spatial soliton pairs can be formed by employing paraxial ray approximation. The physical properties of these soliton pairs are also discussed.