Abstract
Through the supports of the ONR and NSF we have recently developed several schemes which utilize multiple surface acoustic waves for wideband efficient guided-wave acoustooptic (AO) Bragg diffraction. The development of these wideband schemes has made it possible to design and fabricate very wideband guided-wave (thin-film) AO devices, and has thus paved the way for the realization of wideband AO processors in thin-film form. In this paper a review of the more recent developments on wideband (up to 500 MHz bandwidth) guided-wave AO signal processors, emphasizing those being carried out at the authors' institution, is given. The processors to be discussed include spectrum analyzers, convolvers and pulse compressors. Typical performance characteristics that have been obtained are presented. The guided-wave processors, in comparison to their bulk-wave counterparts, possess inherent advantages of requiring less RF drive power, being smaller, lighter weight, less susceptible to environmental effects, and more integratable and thus potentially less costly. Consequently, the guided-wave versions, when fully developed, should complement the existing bulk-wave processors.© (1977) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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