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Proceedings Paper

Five-user QKD over switched fiber networks
Author(s): Jan Bogdanski; Nima Rafiei; Mohamed Bourennane
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Paper Abstract

Unconditionally secure multiuser quantum key distribution (QKD) over long distance switched telecom fiber networks will have a revolutionary impact on people's, companies', and governmental exchange of confidential information. We report five-user QKD over switched fiber networks in both star and tree configurations, using the BB84-protocol with phase encoding. Both setups implement polarization insensitive phase modulators, necessary for birefringent single mode fiber networks. In both configurations, for the mean photon number μ=0.1, we have achieved raw rates between 50Hz and 300Hz at distances between 25km to 50km with quantum bit error rates between 1.24% to 5.56%. The measurements have showed feasibility of multiuser QKD over switched telecom fiber networks, using standard fiber telecom components.

Paper Details

Date Published: 5 September 2008
PDF: 8 pages
Proc. SPIE 7092, Quantum Communications and Quantum Imaging VI, 70920K (5 September 2008); doi: 10.1117/12.798228
Show Author Affiliations
Jan Bogdanski, Stockholm Univ. (Sweden)
Nima Rafiei, Stockholm Univ. (Sweden)
Mohamed Bourennane, Stockholm Univ. (Sweden)

Published in SPIE Proceedings Vol. 7092:
Quantum Communications and Quantum Imaging VI
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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