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

Details Three-dimensional imaging with arrays of Geiger-mode avalanche photodiodes Three-dimensional imaging with arrays of Geiger-mode avalanche photodiodes

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5353..105a&link_type=abstract

Semiconductor Photodetectors. Edited by Linden, Kurt J.; Dereniak, Eustace L. Proceedings of the SPIE, Volume 5353, pp. 105-

Computer Science

5

Scientific paper

Lincoln Laboratory has developed 32 x 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 0.5-ns timing. We discuss the development of these focal planes and present imagery from ladar systems that use them.

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