Signal processing methods in a single-photon counting system

Yanping Chen; Min Du; Rui Li

doi:10.1117/12.754318

24 January 2008 Signal processing methods in a single-photon counting system

Yanping Chen, Min Du, Rui Li

Proceedings Volume 6829, Advanced Materials and Devices for Sensing and Imaging III; 68291A (2008) https://doi.org/10.1117/12.754318
Event: Photonics Asia 2007, 2007, Beijing, China

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.

Citation Download Citation

Yanping Chen, Min Du, and Rui Li "Signal processing methods in a single-photon counting system", Proc. SPIE 6829, Advanced Materials and Devices for Sensing and Imaging III, 68291A (24 January 2008); https://doi.org/10.1117/12.754318

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