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Proceedings Paper

Signal processing methods in a single-photon counting system
Author(s): Yanping Chen; Min Du; Rui Li
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Paper Abstract

Single-photon counting technology has been used extensively in testing due to its powerful quantitative performance for ultraweak luminescence intensity such as high time resolution and large dynamic range. However, some negative factors limit its performance in practice. In this work, the methods for weak signal detection and self-fitting noise suppression were applied to the signal processing in the single-photon counting system in which a photomultiplier tube (PMT) was the photoelectric sensor. Firstly, the weak signal from PMT was amplified by two stage amplifiers and subtracted by its means. And then the lost pluses were corrected by double discriminating voltages as different peaks' circumscriptions. Lastly it was proposed to put program-controlled auto compensation function for self-adjusting ability and high sensitivity. By these methods, the measure errors caused by narrow pulse interval and double-photons peak are decreased whilst the counting efficiency is increased. It was demonstrated that the performance of the single-photon counting system, in which signals were processed with the proposed methods, was enhanced and the system was more flexible in terms of self-fitting measuring.

Paper Details

Date Published: 24 January 2008
PDF: 7 pages
Proc. SPIE 6829, Advanced Materials and Devices for Sensing and Imaging III, 68291A (24 January 2008); doi: 10.1117/12.754318
Show Author Affiliations
Yanping Chen, Fuzhou Univ. (China)
Min Du, Fuzhou Univ. (China)
Rui Li, Fuzhou Univ. (China)

Published in SPIE Proceedings Vol. 6829:
Advanced Materials and Devices for Sensing and Imaging III
Anbo Wang; Yimo Zhang; Yukihiro Ishii, Editor(s)

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