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A detailed four-wave model of acousto-optic (AO) interaction1 in devices formed by planar waveguides and interdigital AO transducers has been used in this paper to identify the highest Bragg diffraction efficiency configurations with reference to the crystal orientation, monomodal guiding parameters, transducer driving radio frequency, f and acoustic loss.

Vertical integration of high-silica channel waveguides on Si substrate has been recently demonstrated by flame hydrolysis deposition.

The superiority of the three-wave-guide directional coupler (3WC) in filtering operations over the conventional 2WC is well known, the main advantage being a spectral response that is the square of that of the 2WC.