科研之友
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摘要
We demonstrate a three-node active quantum key distribution (QKD) network with our previous two-way QKD system. An optical switch is used as a router to connect the two nodes. Adjacent nodes are connected by a 25km optical fiber. The test over 11 h shows that our system can reduce the Raleigh backscattering efficiently in the absence of the storage fiber. Furthermore, the obtained average sifted key is about 1.2 kbps in the network, with high visibility and low quantum bit error rate in the long-time test.
- 出版日期2011-4
- 单位中国人民解放军国防科学技术大学
