Abstract
The components of dissipative weakly coupled states, originating due to collinear Bragg light scattering by the acoustic wave of finite amplitude, are investigated in the square-law nonlinear medium with the linear optical losses. A novel theoretical model is developed for three-wave weakly coupled states of various pulse profiles, propagating in the quasi-stationary regime with the phase mismatch. The availability of both compact and infinite support is analyzed and compared with one another. Two limiting cases for cnoidal profiles are considered in detail and estimated. Their optical components are observed during the acousto-optical experiments in an α-quartz crystalline cell with calibrated optical losses.
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