Review On Guided-Wave Acousto-Optics With Application To Wideband Real-Time Signal Processing*

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Abstract
This paper presents a selective review of planar guided-wave acoustooptics with emphasis on those aspects which relate to wideband real-time signal processing. First to be discussed are the working principle and some key analytical results of a basic Bragg modulator which uses a single aperture SAW transducer. Key para-meters relevant to modulation and signal processing are then discussed. Next the design parameters and procedures for wideband Bragg modulators and deflectors which use multiple transducers in Y-cut LiNb03 waveguides are established. Some potential applications of such wideband modulators and deflectors in rf signal pro-cessing are then described. Finally, a brief up-to-date progress report on the implementation of integrated acoustooptical circuits in both LiNb03 and Si substrates is given.

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