Abstract

In this paper a novel construction of an active quenching circuit intended for single-photon detection is presented, along with a few original methods for its evaluation. The circuit has been combined with a standard avalanche photodiode C30902S to form a single-photon detector. This detector has a dead time of 39ns, maximum random counting frequency of 14MHz, small afterpulsing probability, an estimated peak detection efficiency of over 20%, and a dark count rate of less than 100Hz. This simple and robust active quenching circuit can be built from off-the-shelf electronic components and is presented with the detailed schematic diagram.

© 2009 Optical Society of America

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