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Proceedings Paper

InGaAs avalanche photodiode arrays for simultaneous communications and tracking
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Paper Abstract

Free space optical communication uses photodetectors for two purposes: as communications receivers and, in the form of a quadrant cell or a position sensitive detector, for tracking. Generally two separate detectors are used. In this work we describe combining these functions into one device through the use of heterostructure avalanche photodiode (APD) arrays. Combined functionality more efficiently uses the available light and allows for large area communications detector arrays that maintain the bandwidth and sensitivity of smaller, single-element, devices. In this paper we describe a prototype 2x2 arrays and associated electronics and processing. The design tradeoffs in balancing both functions are explored and future geometries that are more effective than square arrays are described.

Paper Details

Date Published: 14 September 2011
PDF: 8 pages
Proc. SPIE 8162, Free-Space and Atmospheric Laser Communications XI, 81620D (14 September 2011); doi: 10.1117/12.895116
Show Author Affiliations
Mike S. Ferraro, U.S. Naval Research Lab. (United States)
Rita Mahon, U.S. Naval Research Lab. (United States)
William S. Rabinovich, U.S. Naval Research Lab. (United States)
Wade T. Freeman, Smart Logic, Inc. (United States)
James L. Murphy, U.S. Naval Research Lab. (United States)
Peter G. Goetz, U.S. Naval Research Lab. (United States)
Harris R. Burris, U.S. Naval Research Lab. (United States)
Christopher I. Moore, U.S. Naval Research Lab. (United States)
Linda M. Thomas, U.S. Naval Research Lab. (United States)
William R. Clark, Optogration, Inc. (United States)
William D. Waters, Optogration, Inc. (United States)


Published in SPIE Proceedings Vol. 8162:
Free-Space and Atmospheric Laser Communications XI
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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