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Proceedings Paper

Acousto-Optic Joint Transform Correlator As Applied To Spread Spectrum Communications
Author(s): Francis T.S. Yu; Toshio Nagata
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Paper Abstract

A multichannel acousto-optic signal correlator based on optical joint transform correlation (OJTC) is presented. Parallel on-plane acousto-optic (AO) cells and a square law converter are used to produce cross-correlation of temporal-spatial signals. The AO cells are driven by frequency multiplexed temporal signals to produce spatially modulated signals. The joint Fourier transform of these spatially modulated signals is taken at the Fourier plane, where a square law detector converts the signals to a joint power spectra distribution. By simple coherent read-out, crosscorrelation of the input signals can be obtained at the output plane of the OJTC. Note that the proposed architecture can be packaged in a compact form. Since the multi-cell architecture can process broad band communication signals, we believe that the proposed technique can be applied to multi-frequency shift keying, as well as frequency hopped spread spectrum signals.

Paper Details

Date Published: 22 August 1988
PDF: 7 pages
Proc. SPIE 0936, Advances in Optical Information Processing III, (22 August 1988); doi: 10.1117/12.946934
Show Author Affiliations
Francis T.S. Yu, The Pennsylvania State University (United States)
Toshio Nagata, The Pennsylvania State University (United States)

Published in SPIE Proceedings Vol. 0936:
Advances in Optical Information Processing III
Dennis R. Pape, Editor(s)

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