Reducing the read noise of HAWAII-2RG based detector systems with improved reference sampling and subtraction (IRS2)

Bernard J. Rauscher; Richard G. Arendt; D. J. Fixen; Matthew Lander; Don Lindler; Markus Loose; S. H. Moseley; Donna V. Wilson; Christos Xenophontos

doi:10.1117/12.893924

16 September 2011 Reducing the read noise of HAWAII-2RG based detector systems with improved reference sampling and subtraction (IRS²)

Bernard J. Rauscher, Richard G. Arendt, D. J. Fixen, Matthew Lander, Don Lindler, Markus Loose, S. H. Moseley, Donna V. Wilson, Christos Xenophontos

Author Affiliations +

Proceedings Volume 8155, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II; 81550C (2011) https://doi.org/10.1117/12.893924
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

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.

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Bernard J. Rauscher, Richard G. Arendt, D. J. Fixen, Matthew Lander, Don Lindler, Markus Loose, S. H. Moseley, Donna V. Wilson, and Christos Xenophontos "Reducing the read noise of HAWAII-2RG based detector systems with improved reference sampling and subtraction (IRS²)", Proc. SPIE 8155, Infrared Sensors, Devices, and Applications; and Single Photon Imaging II, 81550C (16 September 2011); https://doi.org/10.1117/12.893924

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