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Proceedings Paper

High count rate pseudo-random single photon counting system for time-resolved diffuse optical imaging
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Paper Abstract

Pseudo-random single photon counting (PRSPC) is a new time-resolved method combining the spread spectrum timeresolved optical measurement method with single photon counting. A continuous wave laser diode is modulated with a pseudo-random bit sequence, while a single photon detector is used to record the pulse sequence in response to the modulated excitation. Periodic cross-correlation is performed to retrieve the impulse response. Compared with conventional time-correlated single photon counting (TCSPC), PRSPC enjoys many advantages such as low cost and high count rate without compromising the sensitivity and time-resolution. In this paper, we report a PRSPC system that can be used for high speed acquisition of the temporal spread function of diffuse photons. It can reach a photon count rate as high as 3Mcps (counts per second). Experimental work has been conducted to demonstrate the system performance.

Paper Details

Date Published: 23 February 2010
PDF: 5 pages
Proc. SPIE 7556, Design and Quality for Biomedical Technologies III, 755604 (23 February 2010); doi: 10.1117/12.841924
Show Author Affiliations
Qiang Zhang, National Univ. of Singapore (Singapore)
Nanguang Chen, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 7556:
Design and Quality for Biomedical Technologies III
Ramesh Raghavachari; Rongguang Liang, Editor(s)

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