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Proceedings Paper

Ultra-fast time-correlated single photon counting avalanche photodiodes for time-domain non-contact fluorescence diffuse optical tomography
Author(s): Vincent Robichaud; Éric Lapointe; Yves Bérubé-Lauzière
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Paper Abstract

Recent advances in the design and fabrication of avalanche photodiodes (APDs) and quenching circuits for timecorrelated single photon counting (TCSPC) have made available detectors with timing resolutions comparable to microchannel plate photomultiplier tubes (MCP-PMTs). The latter, were until recently the best TCSPC detectors in terms of temporal resolution (≤30ps). Comparable resolutions can now be obtained with TCSPC APDs at a much lower cost. It should also be possible to manufacture APDs with standard electronics fabrication processes in a near future. This will contribute to further decrease their price and ease their integration in complex multi-channel detection systems, as required in diuse optical imaging (DOI) and tomography (DOT). We present, to our knowledge for the first time, results which demonstrate that, despite their small sensitive area, TCSPC APDs can be used in time-domain (TD) DOT and more generally in TD DOI. With appropriate optical design of the detection channel, our experiments show that it is possible to obtain comparable measurements with APDs as with PMTs.

Paper Details

Date Published: 26 October 2007
PDF: 10 pages
Proc. SPIE 6796, Photonics North 2007, 679606 (26 October 2007); doi: 10.1117/12.778937
Show Author Affiliations
Vincent Robichaud, Univ. de Sherbrooke (Canada)
Éric Lapointe, Univ. de Sherbrooke (Canada)
Yves Bérubé-Lauzière, Univ. de Sherbrooke (Canada)

Published in SPIE Proceedings Vol. 6796:
Photonics North 2007

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