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Proceedings Paper

Low-background infrared hybrid focal plane array characterization
Author(s): Lester J. Kozlowski; Scott A. Cabelli; Donald E. Cooper; Kadri Vural
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Paper Abstract

Exploiting hybrid focal plane array methodology and a flexible multiplexing readout, 128 X 128 FPAs were made and directly compared using several short wavelength infrared (SWIR) and long wavelength (LWIR) detector technologies. The detector types include two GaAs/AlGaAs quantum well infrared photodetectors (QWIP), 1.7 micrometers InGaAs/InP, and 2.5 micrometers PV HgCdTe. The tests were performed at operating temperatures ranging from 35 K for the LWIR devices to as high as 175 K for the SWIR FPAs. Highlights include the first FPA demonstrations (to the best of our knowledge) of BLIP-limited detectivity (D*) for both LWIR GaAs/AlGaAs QWIP and 1.7 micrometers PV InGaAs/Inp. The 9 micrometers QWIP peak detectivity is near the theoretical background limit at 1.2 X 1010 photons/cm2-s background and 35 K operating temperature. The mean D* of 4.5 X 1013 Jones at 8.3 micrometers peak wavelength is 75% of BLIP. A maximum peak D* of 5.7 X 1014 Jones was achieved with the PV InGaAs/InP device at 200 K. This is also believed to be the highest reported FPA-level D* for a staring mosaic array operated at TV-type frame rate and integration time.

Paper Details

Date Published: 20 October 1993
PDF: 5 pages
Proc. SPIE 1946, Infrared Detectors and Instrumentation, (20 October 1993); doi: 10.1117/12.158673
Show Author Affiliations
Lester J. Kozlowski, Rockwell International Science Ctr. (United States)
Scott A. Cabelli, Rockwell International Science Ctr. (United States)
Donald E. Cooper, Rockwell International Science Ctr. (United States)
Kadri Vural, Rockwell International Science Ctr. (United States)

Published in SPIE Proceedings Vol. 1946:
Infrared Detectors and Instrumentation
Albert M. Fowler, Editor(s)

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