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Proceedings Paper

An ultra fast, ultra compact sensor for diffuse wave spectroscopy
Author(s): K. Barjean; D. Ettori; E. Tinet; A. Dupret; M. Vasiliu; J.-M. Tualle
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Paper Abstract

Diffuse Correlation Spectroscopy (DCS) is based on the temporal correlations of the speckle pattern from the light that has diffused through a biological media. Measurements must be made on a small coherence area of the size of a speckle grain. Summing independent measurement increases the SNR as the square root of the number of detectors. We present a bi-dimensionnal pixel CMOS detector array specially designed for this task, with parallel in-pixel demodulation and temporal correlations computation. Optical signals can be processed at a rate higher than 10,000 samples per second with demodulation frequencies in the MHz range.

Paper Details

Date Published: 19 February 2013
PDF: 8 pages
Proc. SPIE 8659, Sensors, Cameras, and Systems for Industrial and Scientific Applications XIV, 865906 (19 February 2013); doi: 10.1117/12.2006376
Show Author Affiliations
K. Barjean, Lab. de Physique des Lasers, CNRS, Univ. Paris 13 (France)
D. Ettori, Lab. de Physique des Lasers, CNRS, Univ. Paris 13 (France)
E. Tinet, Lab. de Physique des Lasers, CNRS, Univ. Paris 13 (France)
A. Dupret, CEA-LETI MINATEC (France)
M. Vasiliu, Institut d’Electronique Fondamentale, CNRS, Univ. Paris-Sud 11 (France)
J.-M. Tualle, Lab. de Physique des Lasers, CNRS, Univ. Paris 13 (France)


Published in SPIE Proceedings Vol. 8659:
Sensors, Cameras, and Systems for Industrial and Scientific Applications XIV
Ralf Widenhorn; Antoine Dupret, Editor(s)

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