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

Frequency Analysis of the noise in the Fowler(n) sampling of a H2RG(2Kx2K) Near-IR Detector