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Opt Lett. 2010 Jul 15;35(14):2454-6. doi: 10.1364/OL.35.002454.

Field test of wavelength-saving quantum key distribution network.

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  • 1Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei 230026, China.


We propose a wavelength-saving topology of a quantum key distribution (QKD) network based on passive optical elements, and we report on the field test of this network on commercial telecom optical fiber at the frequency of 20 MHz. In this network, five nodes are supported with two wavelengths, and every two nodes can share secure keys directly at the same time. We also characterized the insertion loss and cross talk effects on the point-to-point QKD system after introducing this QKD network.

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