Abstract
Conventional acousto-optic devices employ an RF electrical signal applied to a piezoelectric transducer to generate ultrasound. Recent work has been toward all-optical devices in which a high power laser is used to generate ultrasound within an optically clear material. This offers potential to perform acousto-optic modulation without piezoelectric transducers and RF oscillators, and to therefore develop signal processors that work directly on optical data channels. This paper demonstrates the effectiveness of all-optical AO devices for both bulk wave and surface acoustic wave modulation.
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