A fast and versatile quantum key distribution system with hardware key distillation and wavelength multiplexing

Article Article scientifique Article A fast and versatile quantum key distribution system with hardware key distillation and wavelength multiplexing eng 2014 author Walenta Nino 671741 author Burg A. author Caselunghe D. author Constantin Jean-Bernard 135190 author Gisin Nicolas 23716 author Guinnard Olivier 115871 author Houlmann Raphaël 718710 author Junod Pascal 31511 author Korzh Boris 782725 author Kulesza N. author Legre Matthieu 530007 author Lim Ci Wen 724550 author Lunghi Tommaso 744386 author Monat L. author Portmann Céline 593266 author Soucarros M author Thew Rob 0000-0003-0188-6053 541344 author Trinkler Patrick 526607 author Trolliet Gregory 699439 author Vannel Fabien 666594 author Zbinden Hugo 0000-0002-9237-1700 29543 013047 10.1088/1367-2630/16/1/013047 1367-2630 http://stacks.iop.org/1367-2630/16/i=1/a=013047?key=crossref.67d93c8c06267e9ca8c64b7bd7ff240e We present a compactly integrated, 625 MHz clocked coherent one-way quantum key distribution system which continuously distributes secret keys over an optical fibre link. To support high secret key rates, we implemented a fast hardware key distillation engine which allows for key distillation rates up to 4 Mbps in real time. The system employs wavelength multiplexing in order to run over only a single optical fibre. Using fast gated InGaAs single photon detectors, we reliably distribute secret keys with a rate above 21 kbps over 25 km of optical fibre. We optimized the system considering a security analysis that respects finite-key-size effects, authentication costs and system errors for a security parameter of εQKD = 4 × 10−9. Dewey 500.2 35 Groupe de physique appliquée 135 false 1408 Groupe Zbinden New journal of physics 16 1 ed53a700-6e6e-46f4-84b4-6f7300f8ec23 Article (Published version) Public Zbinden2_walenta2014a.pdf 837515 application/pdf openAccess Faculté des sciences / Section de physique / Groupe de physique appliquée

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A fast and versatile quantum key distribution system with hardware key distillation and wavelength multiplexing	New journal of physics			2014	860	1 474

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