A novel synchronization scheme for free-space quantum key distribution system

摘要：

We propose a novel synchronization scheme using a periodic light pulse for free-space quantum key distribution (QKD) system. The repetition rate of timing pulse in the novel synchronization scheme can be reduced to KHz. It allows employing a KHz repetition rate ultrashort pulse laser as timing synchronization source to implement high precision time synchronization. In this paper, short term time drift induced by atmospheric turbulence is analyzed, and how the time deviation impacts on the final secure key generation rate in our QKD system is calculated. In addition, we carried out the QKD experiments over the distance of 1.38 km. The results of the experiments indicate that our scheme is feasible.

关键词： Quantum key distribution time synchronization atmospheric turbulence

作者: Feng Tang Shuang Gao Xiaofei Wang Bing Zhu

作者单位: Dept. of Electronic Engineering and Information Science,University of Science and Technology of China, Hefei, Anhui 230027, China

会议类型: 国际会议

会议名称: 2011亚洲光纤通信与光电国际会议

会议地点: 上海

会议语种:英文

页码: 1-4

在线出版日期: 2011-11-13（万方平台首次上网日期，不代表论文的发表时间）