Gigahertz quantum key distribution with InGaAs avalanche photodiodes

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dc.creatorYuan, Z. L.
dc.creatorDixon, A. R.
dc.creatorDynes, J. F.
dc.creatorSharpe, A. W.
dc.creatorShields, A. J.
dc.date2008-05-22
dc.date.accessioned2026-07-07T09:40:21Z
dc.date.available2026-07-07T09:40:21Z
dc.descriptionWe report a demonstration of quantum key distribution (QKD) at GHz clock rates with InGaAs avalanche photodiodes (APDs) operating in a self-differencing mode. Such a mode of operation allows detection of extremely weak avalanches so that the detector afterpulse noise is sufficiently suppressed. The system is characterized by a secure bit rate of 2.37 Mbps at 5.6 km and 27.9 kbps at 65.5 km when the fiber dispersion is not compensated. After compensating the fiber dispersion, the QKD distance is extended to 101 km, resulting in a secure key rate of 2.88 kbps. Our results suggest that InGaAs APDs are very well suited to GHz QKD applications.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0805.3414
dc.identifierhttp://arxiv.org/abs/0805.3414
dc.identifierAppl. Phys. Lett. 92, 201104(2008)
dc.identifierdoi:10.1063/1.2931070
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161459
dc.subjectQuantum Physics
dc.titleGigahertz quantum key distribution with InGaAs avalanche photodiodes
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