Zhang Yue, Yin Junyue, Zhao Huiqing, Wang Jindong, Ma Ruili, Liu Zihao, Wei Jiahao, Yu Yafei, Wei Zhengjun, Zhang Zhiming
Appl Opt. 2022 Sep 10;61(26):7713-7718. doi: 10.1364/AO.457735.
An efficient phase stabilization method is required in quantum key distribution (QKD) systems for stability in practical applications. The existing active phase compensation method has limitations in multi-node network applications, especially in network-scale applications based on measurement-device-independent QKD systems. In this study, we propose a local active phase compensation scheme that can realize phase compensation independently for each interferometer node. We performed experimental demonstrations in the BB84 phase encoding system based on a Faraday-Michelson interferometer. The average QBER rates of the system under two different forms of the reference light were found to be 1.9% and 1.6%. This scheme can also be applied to other QKD systems and has potential for application in future quantum communication networks.
量子密钥分发（QKD）系统在实际应用中需要一种高效的相位稳定方法来确保稳定性。现有的有源相位补偿方法在多节点网络应用中存在局限性，特别是在基于测量设备无关QKD系统的网络规模应用中。在本研究中，我们提出了一种局部有源相位补偿方案，该方案可以为每个干涉仪节点独立实现相位补偿。我们在基于法拉第 - 迈克尔逊干涉仪的BB84相位编码系统中进行了实验演示。发现系统在两种不同形式的参考光下的平均误码率分别为1.9%和1.6%。该方案还可以应用于其他QKD系统，并在未来的量子通信网络中有应用潜力。
