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Metropolitan all-pass and inter-city quantum communication network

Open access
Chen, Teng-Yun, Wang, Jian, Liang, Hao, Liu, Wei-Yue, Liu, Yang, Jiang, Xiao, Wang, Yuan, Wan, Xu, Cai, Wei-Qi, Ju, Lei, Chen, Luo-Kan, Wang, Liu-Jun, Gao, Yuan, Chen, Kai, Peng, Cheng-Zhi, Chen, Zeng-Bing, Pan, Jian-Wei·2010·Optics Express

Abstract

We have demonstrated a metropolitan all-pass quantum communication network in field fiber for four nodes. Any two nodes of them can be connected in the network to perform quantum key distribution (QKD). An optical switching module is presented that enables arbitrary 2-connectivity among output ports. Integrated QKD terminals are worked out, which can operate either as a transmitter, a receiver, or even both at the same time. Furthermore, an additional link in another city of 60 km fiber (up to 130 km) is seamless integrated into this network based on a trusted relay architecture. On all the links, we have implemented protocol of decoy state scheme. All of necessary electrical hardware, synchronization, feedback control, network software, execution of QKD protocols are made by tailored designing, which allow a completely automatical and stable running. Our system has been put into operation in Hefei in August 2009, and publicly demonstrated during an evaluation conference on quantum network organized by the Chinese Academy of Sciences on August 29, 2009. Real-time voice telephone with one-time pad encoding between any two of the five nodes (four all-pass nodes plus one additional node through relay) is successfully established in the network within 60 km.

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Metadata

Authors
Chen, T.-Y., Wang, J., Liang, H., Liu, W.-Y., Liu, Y., Jiang, X., Wang, Y., Wan, X., Cai, W.-Q., Ju, L., Chen, L.-K., Wang, L.-J., Gao, Y., Chen, K., Peng, C.-Z., Chen, Z.-B., & Pan, J.-W.
Venue
Optics Express
Published
2010-12-10
Volume
18
Issue
26
Pages
27217
ISSN
1094-4087 (ISSN-L)
OpenAlex
W2038468495
Cited by
222
References
2
FWCI
7.14
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Metropolitan all-pass and inter-city quantum communication network. https://app.cochat.ai/papers/10.1364/oe.18.027217
The paper
Chen, T.-Y., Wang, J., Liang, H., Liu, W.-Y., Liu, Y., Jiang, X., Wang, Y., Wan, X., Cai, W.-Q., Ju, L., Chen, L.-K., Wang, L.-J., Gao, Y., Chen, K., Peng, C.-Z., Chen, Z.-B., & Pan, J.-W. (2010). Metropolitan all-pass and inter-city quantum communication network. Optics Express. https://doi.org/10.1364/oe.18.027217

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