Low timing jitter detector for gigahertz quantum key distribution

R. J. Collins, R. H. Hadfield, V. Fernandez, S. W. Nam, G. S. Buller

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


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 3.3GHz and a transmission wavelength of 850nm. 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. © The Institution of Engineering and Technology 2007.

Original languageEnglish
Pages (from-to)180-182
Number of pages3
JournalElectronics Letters
Issue number3
Publication statusPublished - 2007


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