Abstract
Dissipative three-wave weakly coupled states, appearing within collinear and non-collinear Bragg light scattering in a two-mode square-law nonlinear medium with the linear optical losses, are uncovered. The conditions for localizing these dissipative coupled sates as well as the spatial-frequency distributions of their optical components are studied theoretically in quasi-stationary regime. Then, a set of estimations related to the realization of similar dissipative three-wave coupled states have been performed within the acousto-optical experiments in the α-quartz crystalline cells providing collinear and non-collinear geometries of interactions. The distinguishing feature of these potential experiments is the fact that the presence of linear optical losses affects both shaping these dissipative weakly coupled states and the technique for detection and identification of their optical components.
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