Ultra-high bandwidth quantum secured data transmission.

Ultra-high bandwidth quantum secured data transmission.
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DOI:
10.1038/srep35149
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发表时间:
2016-10-13
期刊:
影响因子:
4.6
通讯作者:
Shields AJ
Shields AJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Dynes JF;Tam WW;Plews A;Fröhlich B;Sharpe AW;Lucamarini M;Yuan Z;Radig C;Straw A;Edwards T;Shields AJ

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量子密钥分配(QKD)为光纤网络中的通信安全提供了一种有吸引力的手段。然而,由于经常需要专用的暗光纤将非常微弱的量子信号与传统通信隔离开来,这项技术的部署一直受到阻碍。到目前为止,QKD与数据的共存仅限于比光纤通信网络中常用的带宽低几个数量级的带宽。使用优化的波分复用方案,我们首次在同一光纤上向前传输QKD和流行的100gb /s数据格式。我们展示了一个在100公里光纤上以200 Gb/s带宽运行的全量子加密系统。通过对拉曼噪声的实验测量来探索该技术的极限,我们证明了在50公里的链路上将QKD与10tb /s的数据相结合是可行的。这些结果表明,将QKD和其他量子光子技术集成到高带宽数据通信基础设施中是可能的,从而允许它们的广泛部署。
Quantum key distribution (QKD) provides an attractive means for securing communications in optical fibre networks. However, deployment of the technology has been hampered by the frequent need for dedicated dark fibres to segregate the very weak quantum signals from conventional traffic. Up until now the coexistence of QKD with data has been limited to bandwidths that are orders of magnitude below those commonly employed in fibre optic communication networks. Using an optimised wavelength divisional multiplexing scheme, we transport QKD and the prevalent 100 Gb/s data format in the forward direction over the same fibre for the first time. We show a full quantum encryption system operating with a bandwidth of 200 Gb/s over a 100 km fibre. Exploring the ultimate limits of the technology by experimental measurements of the Raman noise, we demonstrate it is feasible to combine QKD with 10 Tb/s of data over a 50 km link. These results suggest it will be possible to integrate QKD and other quantum photonic technologies into high bandwidth data communication infrastructures, thereby allowing their widespread deployment.
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