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Proceedings Paper

256 x 256 pixel InSb FPA for SIRTF and other astronomical applications
Author(s): Jeffrey D. Biggs; Michael A. Blessinger; Marie L. Louderback
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Paper Abstract

As part of the NASA Space Infrared Telescope Facility (SIRTF), a low noise multiplexer has been developed. The hybridization of this multiplexer to a high quality indium antimonide (InSb) photodiode array has resulted in a MWIR detector of outstanding performance. The multiplexer is made of a 256 X 256 array of source follower amplifiers on a 30 micron square pitch. Random access binary decoders are used to access each pixel of the array, allowing any read-out scheme to be implemented. Dark current has been measured at temperatures ranging from 4 K to 77 K. Generation recombination currents dominate above 45 K. With 100 mV of reverse bias applied, less than 3 X 10-17 A is typical below 50 K with 8 X 10-19 A (5 electrons/second) at 4 K. Under the same conditions 0.25 pA was measured at 77 K. Read noise has been measured as low as 186 electrons using non-correlated techniques. Detector quantum efficiency is 50 to 80 percent through the entire wavelength band of 1 to 5 micrometers .

Paper Details

Date Published: 20 October 1993
PDF: 6 pages
Proc. SPIE 1946, Infrared Detectors and Instrumentation, (20 October 1993); doi: 10.1117/12.158721
Show Author Affiliations
Jeffrey D. Biggs, Cincinnati Electronics Corp. (United States)
Michael A. Blessinger, Cincinnati Electronics Corp. (United States)
Marie L. Louderback, Cincinnati Electronics Corp. (United States)


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

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