Low timing jitter detector for gigahertz quantum key distribution
Low timing jitter detector for gigahertz quantum key distribution
- Author(s): R.J. Collins ; R.H. Hadfield ; V. Fernandez ; S.W. Nam ; G.S. Buller
- DOI: 10.1049/el:20073748
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- Author(s): R.J. Collins 1 ; R.H. Hadfield 2 ; V. Fernandez 1 ; S.W. Nam 2 ; G.S. Buller 1
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View affiliations
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Affiliations:
1: School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
2: School of Engineering and Physical Sciences, National Institute of Standards and Technology, Boulder, USA
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Affiliations:
1: School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom
- Source:
Volume 43, Issue 3,
1 February 2007,
p.
180 – 182
DOI: 10.1049/el:20073748 , Print ISSN 0013-5194, Online ISSN 1350-911X
A superconducting single-photon detector based on a niobium nitride nanowire is demonstrated in an optical-fibre-based quantum key distribution test bed operating at a clock rate of 3.3 GHz and a transmission wavelength of 850 nm. The low jitter of the detector leads to significant reduction in estimated quantum bit error rate and a resultant improvement in secrecy efficiency compared to previous estimates made by use of silicon single-photon avalanche detectors.
Inspec keywords: optical communication equipment; nanowires; error statistics; optical fibre communication; niobium compounds; quantum cryptography; timing jitter; superconducting photodetectors
Other keywords:
Subjects: Superconducting receivers and detectors; Optical communication equipment; Cryptography
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