5 May 2016 Time-Correlated Photon Counting (TCPC) technique based on a photon-number-resolving photodetector
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Abstract
In this report, we present Time-Correlated Photon Counting (TCPC) technique and its applications in time-correlated Raman spectroscopy. The main difference between TCPC and existing Time-Correlated Single Photon Counting (TCSPC) is that the TCPC employs a photon-number-resolving photodetector (SiPM, silicon photomultiplier) and measures exact photon number rather than counting single photon by reducing pulse light intensity, thus high measurement speed and efficiency can be expected. A home-made Raman spectrometer has demonstrated an Instrument Response Function (IRF) ~100ps (FWHM) based on TCPC with a strip SiPM (1mm×0.05mm, containing 500 micro cells), fast and weak Raman signals was separated from slow and strong fluorescence background of bulk trinitrotoluene(TNT)sample. The original Raman spectrum of bulk TNT, measured by TCPC technique, is compared with the result obtained by a commercial Micro-Raman Spectrometer.
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Baicheng Li, Quanlong Miao, Shenyuan Wang, Debin Hui, Tianqi Zhao, Kun Liang, Ru Yang, Dejun Han, "Time-Correlated Photon Counting (TCPC) technique based on a photon-number-resolving photodetector", Proc. SPIE 9858, Advanced Photon Counting Techniques X, 98580L (5 May 2016); doi: 10.1117/12.2222962; https://doi.org/10.1117/12.2222962
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