Impact of common modes correlations and time sampling on the total noise of a H2RG near-IR detector

Bogna Kubik; Remi Barbier; Alain Castera; Eric Chabanat; Sylvain Ferriol; Gerard Smadja

doi:10.1117/12.2055071

23 July 2014 Impact of common modes correlations and time sampling on the total noise of a H2RG near-IR detector

Bogna Kubik, Remi Barbier, Alain Castera, Eric Chabanat, Sylvain Ferriol, Gerard Smadja

Proceedings Volume 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI; 91541B (2014) https://doi.org/10.1117/12.2055071
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

We present the readout noise reduction methods and the 1/f noise response of an 2K × 2K HgCdTe detector similar to the detectors that will be used in the Near Infrared Spectrometer Photometer - one of the instruments of the future ESA mission named Euclid. Various algorithms of common modes subtraction are defined and compared. We show that the readout noise can be lowered by 60% using properly the references provided within the array. A predictive model of the 1/f noise with a given frequency power spectrum is defined and compared to data taken in a wide range of sampling frequencies. In view of this model the definition of ad-hoc readout noises for different sampling can be avoided.

Citation Download Citation

Bogna Kubik, Remi Barbier, Alain Castera, Eric Chabanat, Sylvain Ferriol, and Gerard Smadja "Impact of common modes correlations and time sampling on the total noise of a H2RG near-IR detector", Proc. SPIE 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI, 91541B (23 July 2014); https://doi.org/10.1117/12.2055071

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