A geiger-mode APD photon counting system with adjustable dead-time and interchangeable detector

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Deng, Shijie
Gordon, Declan
Morrison, Alan P.
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Institute of Electrical and Electronics Engineers (IEEE)
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A Geiger-mode avalanche photodiode (GM-APD) photon counting system is presented in this letter. The system provides a maximum counting rate of 35 Mcounts/s and is capable of directly displaying the counting rate and data logging to a PC. In this system, the detector can be easily changed to enhance its usefulness in different applications. A novel active quench and reset integrated circuit (AQR-IC) is designed for the system with adjustable hold-off time from several nanoseconds up to 1.6 μs with a setting resolution of ~6.5 ns. This facilitates optimal performance when using different types of APDs. The AQR-IC also registers each avalanche event as a TTL pulse that is processed by a microcontroller to calculate the photon-counting rate. The microcontroller can be interfaced with a PC over USB to record the measured data and to allow further processing. Software was also written to calculate the photon-counting rate, display the results and save the data to files.
Geiger-mode avalanche photodiode , Single photon counting , Adjustable dead-time , Photon-counting system , Photonics , Cathodes , Radiation detectors , Integrated circuits , Graphical user interfaces , Detectors , Avalanche photodiodes , Integrated optoelectronics , Photodetectors , Photon counting
Deng, S., Gordon, D. and Morrison, A. P. (2016) 'A Geiger-Mode APD Photon Counting System With Adjustable Dead-Time and Interchangeable Detector', IEEE Photonics Technology Letters, 28(1), pp. 99-102. doi: 10.1109/LPT.2015.2487342
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