Shuang Wang, Wei Chen, Zhen-Qiang Yin, Yang Zhang, Tao Zhang, Hong-Wei Li, Fang-Xing Xu, Zheng Zhou, Yang Yang, Da-Jun Huang, Li-Jun Zhang, Fang-Yi Li, Dong Liu, Yong-Gang Wang, Guang-Can Guo, Zheng-Fu Han
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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http://arxiv.org/abs/1203.4321
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