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Proceedings Paper

Observatory deployment and characterization of SAPHIRA HgCdTe APD arrays
Author(s): Dani Atkinson; Donald Hall; Sean Goebel; Shane Jacobson; Ian Baker
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Paper Abstract

We present results from several years of laboratory characterization and telescope deployment of the near infrared (NIR) avalanche photodiode (APD) array SAPHIRA from Leonardo S.p.A. Dark current has fallen by three orders of magnitude and we have demonstrated NIR photon counting. Tunnel-tunnel current dominates measured dark current at high bias voltages for temperatures ≤ 65K. At higher temperatures, tunnel-thermal dominates. At low temperatures and bias voltages, dark is glow-limited and not responsive to either temperature or bias voltage. Histograms of individual avalanche events show a broad distribution but allow for photon-counting. Several deployments of the SAPHIRA have also been conducted.

Paper Details

Date Published: 6 July 2018
PDF: 10 pages
Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107091H (6 July 2018); doi: 10.1117/12.2311814
Show Author Affiliations
Dani Atkinson, NASA Goddard Space Flight Ctr. (United States)
Donald Hall, Institute for Astronomy, Univ. of Hawai'i at Mānoa (United States)
Sean Goebel, Institute for Astronomy, Univ. of Hawai'i at Mānoa (United States)
Shane Jacobson, Institute for Astronomy, Univ. of Hawai'i at Mānoa (United States)
Ian Baker, Leonardo S.p.A. (United Kingdom)


Published in SPIE Proceedings Vol. 10709:
High Energy, Optical, and Infrared Detectors for Astronomy VIII
Andrew D. Holland; James Beletic, Editor(s)

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