Passive Surveillance Applications Of Acousto-Optic Processors

Irwin J . Abramovitz

doi:10.1117/12.948363

28 October 1985 Passive Surveillance Applications Of Acousto-Optic Processors

Irwin J . Abramovitz

Proceedings Volume 0545, Optical Technology for Microwave Applications II; (1985) https://doi.org/10.1117/12.948363
Event: 1985 Technical Symposium East, 1985, Arlington, United States

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.

Citation Download Citation

Irwin J . Abramovitz "Passive Surveillance Applications Of Acousto-Optic Processors", Proc. SPIE 0545, Optical Technology for Microwave Applications II, (28 October 1985); https://doi.org/10.1117/12.948363

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