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The characterisation of the linearity of response and spatial uniformity of response of two InGaAsP/InP Geiger-mode avalanche photodiodes.

Theocharous, E; Itzler, M A*; Cheung, J Y; Chunnilall, C J (2010) The characterisation of the linearity of response and spatial uniformity of response of two InGaAsP/InP Geiger-mode avalanche photodiodes. IEEE J. Quantum Electron., 46 (11). pp. 1561-1567.

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Abstract

The linearity of response and spatial uniformity of response characteristics of two commercially-available Single Photon Avalanche photo Diode (SPAD) detection systems were experimentally investigated using the NPL detector linearity of response and spatial uniformity of response characterization facilities. Both SPAD detection systems were shown to exhibit a highly non-linear response. Moreover, the spatial uniformity of response of both SPAD systems was shown to be highly non-uniform and the degree of non-uniformity depended on the single photon detection probability setting of these systems. The experimentally observed spatial uniformity of response behaviour of these detectors is explained in terms of the spatial non-uniformity in the breakdown voltage Vb across the active area of the device. The experimentally observed linearity of response characteristics of these detectors at high count rates can be explained in terms of 'pulse collisions'. However, the origin of the experimentally observed linearity of response characteristics of the same detectors at low count rates is currently unknown.

Item Type: Article
Keywords: Avalanche photodiode, Linearity of response, Photon counting, Spatial uniformity
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Few Photon Science
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4794

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