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Proceedings Paper

Three-dimensional imaging with arrays of Geiger-mode avalanche photodiodes
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Paper Abstract

Lincoln Laboratory has developed 32×32-pixel ladar focal planes comprising silicon Geiger-mode avalanche photodiodes and high-speed all-digital CMOS timing circuitry in each pixel. In Geiger-mode operation, the APD can detect as little as a single photon, producing a digital CMOS-compatible voltage pulse. This pulse is used to stop a high-speed counter in the pixel circuit, thus digitizing the time of arrival of the optical pulse. This "photon-to-digital conversion" simultaneously achieves single-photon sensitivity and 0.25-ns timing precision. We discuss the development of these focal planes and present imagery from ladar systems that use them.

Paper Details

Date Published: 24 October 2005
PDF: 12 pages
Proc. SPIE 6014, Active and Passive Optical Components for WDM Communications V, 60140D (24 October 2005); doi: 10.1117/12.633531
Show Author Affiliations
Brian F. Aull, MIT Lincoln Lab. (United States)
Richard M. Marino, MIT Lincoln Lab. (United States)


Published in SPIE Proceedings Vol. 6014:
Active and Passive Optical Components for WDM Communications V
Achyut K. Dutta; Yasutake Ohishi; Niloy K. Dutta; Jesper Moerk, Editor(s)

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