Abstract The collinear surface acoustic wave properties that determine the induced grating parameters have been investigated using a rigorous modeling of the surface acouseic wave propagation in multiplayer. The guided-to-leaky mode conversion by the induced diffraction grating from surface acouseic wave is analyzed using a generalized multimode formulation of the coupled mode theory. Mode conversion efficiency has been calculated as functions of acoustic frequency, interaction length, guiding layer thickness, and acoustic drive power density.Key words collinear acoustooptic interaction; mode conversion efficiency; coupled mode theory
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