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Proceedings Paper

Reducing the read noise of HAWAII-2RG based detector systems with improved reference sampling and subtraction (IRS2)
Author(s): Bernard J. Rauscher; Richard G. Arendt; D. J. Fixen; Matthew Lander; Don Lindler; Markus Loose; S. H. Moseley; Donna V. Wilson; Christos Xenophontos
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Paper Abstract

In a previous paper,1 we described a method for significantly reducing the read noise of HAWAII-2RG (H2RG) and SIDECAR application specific integrated circuit (ASIC) based detector systems by making better use of reference signals. "Improved Reference Sampling & Subtraction" (IRS2; pronounced "IRS-square") is based on: (1) making better use of the H2RG's reference output, (2) sampling reference pixels more frequently in the time domain, and (3) optimal subtraction of both the reference output and reference pixels in the Fourier domain. Here we demonstrate that IRS2 works as expected using an engineering grade James Webb Space Telescope (JWST) SIDECAR ASIC and H2RG detector array. We were able to reduce the read noise per frame from 25 e- rms using traditional JWST readout to 10 e- rms per frame using IRS2. The only aspect of the system that we changed to make these impressive improvements was the SIDECAR ASIC readout software -we did not change the hardware.

Paper Details

Date Published: 16 September 2011
PDF: 15 pages
Proc. SPIE 8155, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II, 81550C (16 September 2011); doi: 10.1117/12.893924
Show Author Affiliations
Bernard J. Rauscher, NASA Goddard Space Flight Ctr. (United States)
Richard G. Arendt, NASA Goddard Space Flight Ctr. (United States)
D. J. Fixen, CRESST/UMBC/GSFC (United States)
Matthew Lander, Goddard Space Flight Ctr. (United States)
Don Lindler, Sigma Space Corp./GSFC (United States)
Markus Loose, Markury Scientific, Inc. (United States)
S. H. Moseley, NASA Goddard Space Flight Ctr. (United States)
Donna V. Wilson, Goddard Space Flight Ctr. (United States)
Christos Xenophontos, Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8155:
Infrared Sensors, Devices, and Applications; and Single Photon Imaging II
Manijeh Razeghi; Paul D. LeVan; Ashok K. Sood; Priyalal S. Wijewarnasuriya, Editor(s)

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