作　　者： ; ; ; ; ;

机构地区： 北京邮电大学信息与通信工程学院

出　　处： 《光子学报》 2014年第S1期54-58,共5页

摘　　要： 针对量子网络在运行过程中存在着灵活性差、耗材多、升级困难等缺点,本文提出一种基于交换节点的更加灵活、节能、高效的新型量子密钥分配网络结构,即利用环形器和粗波分复用技术,将交换节点和量子/经典光信号收发节点结合,组成星型量子网络.该网络将量子信号、同步信号和经典光信号融合到一根光纤中传输,节省了大量的光纤资源;如果需要增加用户只需更改交换节点内部的结构即可,升级灵活.本文在这个结构的基础上进行了一系列实验研究,证明了此结构对量子密钥分配的误码率和密码产生速率影响很小,且三种信号之间的干扰基本不影响量子网络的通信效果,在优化之后可以用于量子城域网中. There are many solutions using optical passive devices(like optical splitters,2*2switches or MUX/DEMUX)for quantum network.Considering that these solutions have obvious disadvantages which affect the performance of quantum network,such as inferior flexibility and more materials using,we proposed a novel quantum network system structure based on the quantum switching node using CIR and coarse wavelength division multiplex(CWDM),which is more flexible,economical and efficient for quantum network in the near future.The structure combines the quantum signal,the synchronizing signal and the classical optical signal into one optical fiber.A series of experiments have been conducted to prove advantages of the structure which can be used in the quantum key distribution metropolitan area network after optimization.

关 键 词： 量子密钥分配 量子网络 交换节点 光通信 保密通信

领　　域： [电子电信] [电子电信]