Extraction of the frequency spectrum of the noise of a HAWAII2RG NIR detector and impact on low-flux measurements

C. Cerna; G. Smadja; A. Castera; A. Ealet

doi:10.1117/12.856724

19 July 2010 Extraction of the frequency spectrum of the noise of a HAWAII2RG NIR detector and impact on low-flux measurements

C. Cerna, G. Smadja, A. Castera, A. Ealet

Author Affiliations +

Proceedings Volume 7742, High Energy, Optical, and Infrared Detectors for Astronomy IV; 77421J (2010) https://doi.org/10.1117/12.856724
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

The readout noise of a H2RG HgCdTe NIR detector from Teledyne is measured at a temperature T=110K. It is shown that a Fowler mode with n = 240 allows to reach a noise of 2.63e (single read). A description of the power spectrum in terms of 3 parameters reproduces the variation of the noise as a function the number of Fowler samples, as well as its dependence on the periodicity of the sampling. The variance of the noise decreases with frequency with an effective power of 0.62 in our measurement domain. The behaviour of the detector under different experimental conditions can then be predicted.

Citation Download Citation

C. Cerna, G. Smadja, A. Castera, and A. Ealet "Extraction of the frequency spectrum of the noise of a HAWAII2RG NIR detector and impact on low-flux measurements", Proc. SPIE 7742, High Energy, Optical, and Infrared Detectors for Astronomy IV, 77421J (19 July 2010); https://doi.org/10.1117/12.856724

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