title: Scalable multiplexed detector system for high-rate telecom-band single-photon detection.
abstract: 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.
authors: Istituto Nazionale di Ricerca Metrologica, 91 Strada delle Cacce, 10135 Torino, Italy.
authors: G
authors: G
authors: Brida
authors: I P
authors: IP
authors: Degiovanni
authors: F
authors: F
authors: Piacentini
authors: V
authors: V
authors: Schettini
authors: S V
authors: SV
authors: Polyakov
authors: A
authors: A
authors: Migdall