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Field test of the wavelength-saving quantum key distribution network

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arxiv 1203.4321 v1 pith:X4A7CLDR submitted 2012-03-20 quant-ph

Field test of the wavelength-saving quantum key distribution network

Shuang Wang , Wei Chen , Zhen-Qiang Yin , Yang Zhang , Tao Zhang , Hong-Wei Li , Fang-Xing Xu , Zheng Zhou
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Yang Yang Da-Jun Huang Li-Jun Zhang Fang-Yi Li Dong Liu Yong-Gang Wang Guang-Can Guo Zheng-Fu Han
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classification quant-ph
keywords networkdistributionfieldnodesopticalquantumtestwavelength-saving
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We propose a wavelength-saving topology of quantum key distribution(QKD) network based on passive optical elements, and report the field test of this network on the commercial telecom optical fiber. In this network, 5 nodes are supported with 2 wavelengths, and every two nodes can share secure keys directly at the same time. All QKD links in the network operate at the frequency of 20 MHz. We also characterized the insertion loss and crosstalk effects on the point-to-point QKD system after introducing this QKD network.

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