Multiuser quantum key distribution over telecom fiber networks

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• 作者：Jan Bogdanski ; Nima Rafiei ; Mohamed Bourennane
• 关键词：QKD ; BB84 ; “ ; Plug & ; play” ; Multiuser ; Switched networks ; Birefringence ; Decoy states
• 刊名：Optics Communications
• 出版年：2009
• 出版时间：15 January 2009
• 年：2009
• 卷：282
• 期：2
• 页码：258-262
• 全文大小：172 K

文摘

We report five-user quantum key distribution (QKD) over switched fiber networks in both star and tree configurations, using the BB84-protocol [1] with phase encoding. Both setups implement polarization insensitive phase modulators, necessary for birefringent single mode fiber (SMF) networks. In both configurations we have achieved transmission distances between 25 km and 50 km with quantum bit error rates between 1.24 % and 5.56 % for the mean photon number μ=0.1. The measurements have showed feasibility of multiuser QKD over switched fiber networks, using standard fiber telecom components.