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Proceedings Paper

Broadband high-power photodetector arrays for photonically implemented phased-array antenna architectures
Author(s): David C. Scott; Timothy A. Vang; James E. Leight; David V. Forbes; Karen Everett; Fernando D. Alvarez; Roosevelt Johnson; John C. Brock; Lawrence J. Lembo
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Paper Abstract

The authors present a monolithically integrated photodetector array combiner approach that operates over an extremely wide RF bandwidth. These arrays are suitable for coherent RF signal combining applications such as optically controlled phased array radar. The approach consisted of a monolithically integrated array of high-power, wideband photodetectors distributed along an RF transmission line resulting in a low power consumption, broadband, high power handling optical-to-RF combiner, The authors demonstrated a 4-element photodetector array with a small-signal 3dB bandwidth of 34 GHz. RF models were developed and calibrated to the measured results to predict the performance of larger arrays. The models predict than an 8-, 16-, and 48-element array would have a small-signal 3dB bandwidth of 25 Ghz, 15.7GHz, and 5.8GHz respectively. These arrays showed a reasonable amount of robustness to variations and/or errors in the time delays of the input optical feed network suggesting that implementation outside the laboratory should be practical.

Paper Details

Date Published: 7 September 2000
PDF: 10 pages
Proc. SPIE 4112, Radio Frequency Photonic Devices and Systems, (7 September 2000);
Show Author Affiliations
David C. Scott, TRW, Inc. (United States)
Timothy A. Vang, TRW, Inc. (United States)
James E. Leight, TRW, Inc. (United States)
David V. Forbes, TRW, Inc. (United States)
Karen Everett, TRW, Inc. (United States)
Fernando D. Alvarez, TRW, Inc. (United States)
Roosevelt Johnson, TRW, Inc. (United States)
John C. Brock, TRW, Inc. (United States)
Lawrence J. Lembo, TRW, Inc. (United States)

Published in SPIE Proceedings Vol. 4112:
Radio Frequency Photonic Devices and Systems
Andrew R. Pirich; Anastasios P. Goutzoulis; Paul L. Repak, Editor(s)

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