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Proceedings Paper

Passive Surveillance Applications Of Acousto-Optic Processors
Author(s): Irwin J . Abramovitz
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Paper Abstract

Passive surveillance systems requiring wideband signal processing may benefit from a recently developed compact acousto-optic time-integrating correlator. The correlator has a bandwidth of 100 MHz about a center frequency (IF) of 300 MHz to provide time-difference-of-arrival information with a resolution of less than 10 nsec useful in locating wideband radar jammers when signals are received at two widely separated antennas. On an airborne platform, the correlator may perform passive ranging. This correlator features the use of counterpropagating surface acoustic waves on a single lithium niobate delay line interacting with light from a laser diode. Diffracted beams are interferometrically combined on an integrating photodiode array. Integration time of 1 msec provides a time-bandwidth product of 105. A two dimensional correlator allows processing of both time-difference-of-arrival and differential Doppler.

Paper Details

Date Published: 28 October 1985
PDF: 6 pages
Proc. SPIE 0545, Optical Technology for Microwave Applications II, (28 October 1985); doi: 10.1117/12.948363
Show Author Affiliations
Irwin J . Abramovitz, Westinghouse Electric Corporation (United States)

Published in SPIE Proceedings Vol. 0545:
Optical Technology for Microwave Applications II
Shi-Kay Yao, Editor(s)

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