基于双M-Z干涉仪随机稳定量子密钥分发  

Quantum key distribution based on two asymmetric Mach-Zehnder interferometers

作　　者：赵峰[1] 王发强[1] 郑力明[1] 路轶群[1] 廖常俊[1] 刘颂豪[1] 

机构地区：[1]华南师范大学信息光电子科技学院光子信息技术广东省高校重点实验室

出　　处：《光电工程》2007年第5期109-112,共4页Opto-Electronic Engineering

基　　金：国家973资助项目(G2001039302)

摘　　要：基于非等臂双M-Z光纤干涉仪的量子密钥分发系统,这种量子密钥分发系统容易受到外界环境的干扰导致相位漂移,而干涉的稳定性直接关系到密钥分发的误码率。利用跟踪相位随机漂移和实时统计方式实现稳定量子密钥分发,成功进行了75Km的量子密钥分发实验。跟踪相位随机变化实现稳定密钥分发具有系统结构简单,容易操作,同时密钥分发时间上具有一定的随机性,因此减小了窃听者获得信息的概率。Quantum Key Distribution （QKD） system based on the two asymmetric Mach-Zehnder optical fiber interferometers is easily influenced by the external environmental interference, which causes phase excursion. And the high interference visibility of QKD system can＇t keep for long and the instability of interference could cause the bit error of QKD. By tracking the stochastic phase excursion in statistical manner, the experiment of quantum key distribution over 75km was done successfully during the time of high interference visibility. The method of QKD in this paper is possessed of high security, less component, and easy operation.

关 键 词：量子保密通信 相位漂移 M-Z光纤干涉仪 

分 类 号：TN918[电子电信—通信与信息系统]