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Proceedings Paper

Improved passive quenching with active reset circuit
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Paper Abstract

We report an improved passive-quenching-with-active-reset (PQAR) circuit that can operate in a free-running mode with reduced afterpulsing. A dynamic range of approximately 80 dB has been achieved. A model that reveals the factors that determine the dynamic range is described. The PQAR circuit approach can also be utilized in gated mode, which we refer to as gated-PQAR circuit. Compared to conventional gated quenching, the gated-PQAR circuit can significantly reduce the current flow during avalanche. This will reduce afterpulsing and provide the capability of utilizing wider ac bias pulses, which will ease restrictions on synchronization with the arrival of incident photons.

Paper Details

Date Published: 30 April 2009
PDF: 9 pages
Proc. SPIE 7320, Advanced Photon Counting Techniques III, 73200W (30 April 2009); doi: 10.1117/12.818313
Show Author Affiliations
Chong Hu, Univ. of Virginia (United States)
Mingguo Liu, Photodigm, Inc. (United States)
Joe C. Campbell, Univ. of Virginia (United States)


Published in SPIE Proceedings Vol. 7320:
Advanced Photon Counting Techniques III
Mark A. Itzler; Joe C. Campbell, Editor(s)

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