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Proceedings Paper

HgCdTe APD-based linear-mode photon counting components and ladar receivers
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Paper Abstract

Linear mode photon counting (LMPC) provides significant advantages in comparison with Geiger Mode (GM) Photon Counting including absence of after-pulsing, nanosecond pulse to pulse temporal resolution and robust operation in the present of high density obscurants or variable reflectivity objects. For this reason Raytheon has developed and previously reported on unique linear mode photon counting components and modules based on combining advanced APDs and advanced high gain circuits. By using HgCdTe APDs we enable Poisson number preserving photon counting. A metric of photon counting technology is dark count rate and detection probability. In this paper we report on a performance breakthrough resulting from improvement in design, process and readout operation enabling >10x reduction in dark counts rate to ~10,000 cps and >104x reduction in surface dark current enabling long 10 ms integration times. Our analysis of key dark current contributors suggest that substantial further reduction in DCR to ~ 1/sec or less can be achieved by optimizing wavelength, operating voltage and temperature.

Paper Details

Date Published: 6 July 2011
PDF: 18 pages
Proc. SPIE 8033, Advanced Photon Counting Techniques V, 80330M (6 July 2011); doi: 10.1117/12.888134
Show Author Affiliations
Michael Jack, Raytheon Vision Systems (United States)
Justin Wehner, Raytheon Vision Systems (United States)
John Edwards, Raytheon Vision Systems (United States)
George Chapman, Raytheon Vision Systems (United States)
Donald N. B. Hall, Institute for Astronomy, Univ. of Hawaii (United States)
Shane M. Jacobson, Institute for Astronomy, Univ. of Hawaii (United States)

Published in SPIE Proceedings Vol. 8033:
Advanced Photon Counting Techniques V
Mark A. Itzler; Joe C. Campbell, Editor(s)

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