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Optical Engineering

Programmable frequency excision and adaptive filtering with a GaAs/AlGaAs/GaAs heterojunction photoconductor array
Author(s): Gordon Wood Anderson; Francis J. Kub; Rebecca L. Grant; Nicolas A. Papanicolaou; John A. Modolo; Douglas E. Brown
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Paper Abstract

The first demonstration of acousto-optical excision using a GaAs photodetector array is reported. A maximum isolation of 40 dB was obtained using a six element GaAs interdigitated finger double heterojunction photo conductor array. The center frequency was 45 MHz, and the swept bandwidth was 6 MHz. The response of discrete GaAs heterojunction photo conductors was linear with bias voltage, potentially making them useful for performing multiplication functions in optical analog filters. New concepts of using these photo conductors for optical adaptive filters are presented.

Paper Details

Date Published: 1 October 1990
PDF: 6 pages
Opt. Eng. 29(10) doi: 10.1117/12.55722
Published in: Optical Engineering Volume 29, Issue 10
Show Author Affiliations
Gordon Wood Anderson, Naval Research Lab. (United States)
Francis J. Kub, Naval Research Lab. (United States)
Rebecca L. Grant, Dept. of Defense (United States)
Nicolas A. Papanicolaou, U.S. Navy (United States)
John A. Modolo, U.S. Navy (United States)
Douglas E. Brown, National Security Agency (United States)

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