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Proceedings Paper

Broadband Beamforming Via Acousto-Optics
Author(s): Shih-Chun Lin; John Hong; R.Scott Boughton; Demetri Psaltis
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Paper Abstract

A novel broadband beamformer based on space-integrating, interferometric multichannel acousto-optic correlators was proposed. Both analysis and experiments were carried out to validate the concept. Simultaneous beamforming and pulse compression were demonstra'ted by an experimental simulation with a 126-bit PN coded signal of 50-MHz bandwidth. Analysis also showed that the system was suitable for multiple beamforming. The responses of the system to narrow (cw) and wideband (random noise) jammers, both on-boresight and off-bore-sight, were investigated experimentally. Results showed that, against these interferences, the system was quite robust due to the processing gain, even for the worst case where the jammers was on-boresight and its frequency coincided with the signal carrier. However, the system's sensitivity was reduced by a factor of four for the wideband jammer and a factor of ten for the narrow band jammer. The dynamic range of the system was measured to exceed 20 dB, only to be limited by detector saturation and Bragg cell non-linearity. The system could be made adaptive.

Paper Details

Date Published: 22 August 1988
PDF: 11 pages
Proc. SPIE 0936, Advances in Optical Information Processing III, (22 August 1988); doi: 10.1117/12.946929
Show Author Affiliations
Shih-Chun Lin, The Aerospace Corporation (United States)
John Hong, The Aerospace Corporation (United States)
R.Scott Boughton, The Aerospace Corporation (United States)
Demetri Psaltis, California Institute of Technology (United States)

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

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