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Scalable multiplexed detector system for high-rate telecom-band single-photon detection

TitleScalable multiplexed detector system for high-rate telecom-band single-photon detection
Publication TypeJournal Article
Year of Publication2009
AuthorsG. Brida, I. P. Degiovanni, F. Piacentini, V. Schettini, S. V. Polyakov, and A. L. Migdall
JournalRev. Sci. Instrum.
Date Publishednov
Keywords2009, infrared detectors, multiplexing, optical receivers, photodetectors, Photon counting, quantum communication, Quantum optics

We present an actively multiplexed photon-counting detection system at telecom wavelengths that overcomes the difficulties of photon-counting at high rates. We find that for gated detectors, the heretofore unconsidered deadtime associated with the detector gate is a critical parameter, that limits the overall scalability of the scheme to just a few detectors. We propose and implement a new scheme that overcomes this problem and restores full scalability that allows an order of magnitude improvement with systems with as few as 4 detectors. When using just two multiplexed detectors, our experimental results show a 5x improvement over a single detector and a greater than 2x improvement over multiplexed schemes that do not consider gate deadtime.


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