Design of Electronics for Phase Coding QKD System

YANG Yang; WANG Yong-gang; CHEN Wei; WANG Shuang; ZHANG Li-jun; HUANG Da-jun; ZHANG Tao; HAN Zheng-fu

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Design of Electronics for Phase Coding QKD System

更新时间：2025-07-16

- Design of Electronics for Phase Coding QKD System
- Acta Electronica Sinica Vol. 39, Issue 11, Pages: 2604-2609(2011)
- 作者机构：
  
  1. 中国科学技术大学近代物理系,安徽,合肥,230026
  2. 中国科学技术大学中国科学院量子信息重点实验室,安徽,合肥,230026
  3. 中国科学技术大学近代物理系安徽合肥,230026
  4. 中国科学技术大学中国科学院量子信息重点实验室安徽合肥,230026
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP309.7
- Published：2011
- 稿件说明：
移动端阅览
YANG Yang, WANG Yong-gang, CHEN Wei, et al. Design of Electronics for Phase Coding QKD System[J]. Acta Electronica Sinica, 2011, 39(11): 2604-2609.
DOI：

YANG Yang, WANG Yong-gang, CHEN Wei, et al. Design of Electronics for Phase Coding QKD System[J]. Acta Electronica Sinica, 2011, 39(11): 2604-2609. DOI：

摘要

相位编码是目前基于光纤传输的量子密钥分发(QKD)系统采用最多的方式

对控制电子学的设计提出了诸多挑战.本文在介绍相位编码QKD系统控制电子学整体设计基础上

重点分析相位编码QKD系统在同步机制、自动相位扫描补偿等方面的特殊要求和设计实现.本文设计的控制电子学和必要光学器件组成的QKD系统可以作为量子密钥分发网络中独立节点

已成功地运行于安徽省芜湖市电信商用通信光纤网络之上

实现了多个通信节点之间使用量子密码的加密通信.整个QKD系统在20MHz的光脉冲重复速率上实现了BB84相位编码协议

达到了在20km传输距离上2.95%的量子比特误码率(QBER)以及4.91kbps的安全密钥生成率.

Abstract

Phase coding is frequently used in current quantum key distribution(QKD) systems.It has posed many technical challenges on the design of the control electronics.After the description to the overall design of our phase coding QKD system

the paper focuses on the special requirements and implementations on the synchronizing mechanism and automatic phase drift scanning and compensation.The electronics designed in this paper combining with the optical devices can be an independent node device of a QKD network.We have successfully used these node devices to build a practical encrypted communication system through the commercial communication optical fiber system of Wuhu Telecom in Anhui Province.Encrypted communication between multiple nodes by quantum cryptography is implemented in this system.The QKD system in the network actualizes BB84 phase coding protocol at 20MHz repetition rate of light pulses.It achieves quantum bit error rate(QBER)2.95% and secure key generation rate 4.91kbps with a 20km transmission distance.

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