基于时分复用技术的量子密钥分发系统

量子电子学报

基于时分复用技术的量子密钥分发系统

闫瑞1，洪占勇1，刘建宏2，余刚2

1合肥工业大学工业与装备技术研究院，安徽合肥 230009； 2科大国盾量子技术股份有限公司，安徽合肥 230088

出版日期:2018-11-28 发布日期:2018-11-14
通讯作者: 洪占勇（1970-），安徽蚌埠人，硕士，副教授，硕士生导师，主要从事在线检测技术及仪器智能化方面的研究。 E-mail:hongzhanyong@126.com
作者简介:闫瑞（1991-），安徽亳州人，研究生，主要从事量子密钥分发方面的研究。
基金资助:
Supported by Specialized Program for Innovation Construction of Anhui Province of China

Quantum key distribution system based on time-division multiplexing technique

YAN Rui1, HONG Zhanyong1, LIU Jianhong2, YU Gang2

1 Institute of Industry and Equipment Technology, Hefei University of Technology, Hefei 230009, China; 2 QuantumCTek Co., Ltd., Hefei 230088, China

Published:2018-11-28 Online:2018-11-14
Supported by:
安徽省创新型省份建设专项, 16030901056

摘要/Abstract

摘要： 基于时分复用技术，采用一个单光子探测器（SPD）设计了基于BB84协议的量子密钥分发（QKD）系统。在接收端不同偏振态信号光的光路上依次增加6 m的延时光纤，使得不同偏振态信号光到达SPD的时间相应地依次相差30 ns。在信号光与同步光精准同步的前提下，接收端对不同偏振态信号光的探测门进行编号，SPD在不同编号的探测门处探测相应的偏振态光子。安全分析表明该QKD系统能够经受窃听者采取的截取-重发攻击，确保通信安全可靠。该QKD系统成功应用于520 m的QKD实验，成码率为4.00 kbps,误码率为1.5%。

关键词: 量子光学, 量子密钥分发, 时分复用, BB84协议, 探测门

Abstract: Based on time-division multiplexing technology, a quantum key distribution (QKD) system based on BB84 protocol is designed by using a single photon detector (SPD). The delay fiber with an increase of 6 m in turn is added to the different polarization signal optical path at the receiving end, which makes the arrival time of different polarization signal light to the SPD vary by 30 ns in turn. On the premise of accurate synchronization of signal and synchronous light, the detecting gate of different polarization signal light is numbered at the receiving end. The corresponding polarized photons are detected by SPD at different numbering gates. Security analysis results show that the QKD system can resist intercept-resent attack by eavesdroppers and ensure the security and reliability of communications. The QKD system is successfully applied to the 520 m QKD experiment. The key rate is 4.00 kbps and bit error rate is 1.5%.

Key words: quantum optics, quantum key distribution, time-multiplexing, BB84 protocol, detecting gate

中图分类号:

闫瑞1，洪占勇1，刘建宏2，余刚2. 基于时分复用技术的量子密钥分发系统[J]. 量子电子学报.

YAN Rui1, HONG Zhanyong1, LIU Jianhong2, YU Gang2. Quantum key distribution system based on time-division multiplexing technique[J]. Chinese Journal of Quantum Electronics.

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