Programmable frequency excision and adaptive filtering with a GaAs/AlGaAs/GaAs heterojunction photoconductor array

Gordon Wood Anderson; Francis J. Kub; Rebecca L. Grant; Nicolas A. Papanicolaou; John A. Modolo; Douglas E. Brown

doi:10.1117/12.55722

1 October 1990 Programmable frequency excision and adaptive filtering with a GaAs/AlGaAs/GaAs heterojunction photoconductor array

Gordon Wood Anderson, Francis J. Kub, Rebecca L. Grant, Nicolas A. Papanicolaou, John A. Modolo, Douglas E. Brown

Author Affiliations +

Optical Engineering, Vol. 29, Issue 10, (October 1990). https://doi.org/10.1117/12.55722

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.

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Gordon Wood Anderson, Francis J. Kub, Rebecca L. Grant, Nicolas A. Papanicolaou, John A. Modolo, and Douglas E. Brown "Programmable frequency excision and adaptive filtering with a GaAs/AlGaAs/GaAs heterojunction photoconductor array," Optical Engineering 29(10), (1 October 1990). https://doi.org/10.1117/12.55722

Published: 1 October 1990

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