基于分光器的QKD系统密钥分发效率研究  

Key-distribution Efficiency of Practical QKD System Based on Selecting Bases Using Optical Splitter

作　　者：马丙超 鲁芳[2] 白俊[3] 

机构地区：[1]中国人民解放军91800部队 [2]嘉兴市人民防空办公室 [3]解放军理工大学通信工程学院

出　　处：《军事通信技术》2017年第1期63-66,共4页Journal of Military Communications Technology

摘　　要：针对基于分光器选基的实际量子密钥分发系统的密钥分发效率问题,文章研究了平均光子数、光路衰减系数、探测器效率、暗计数率与有效探测效率的关系,给出了最大探测效率,并进行了实例计算分析。研究结果表明,平均光子数小于1时,分光器能够实现开关功能。The key-distribution efficiency of practical quantum key distribution system was analyzed using the way selecting bases using optical splitter. The relationship between average photon number, coefficient of light-path-loss, efficiency of detector, dark-count ratio and coefficient of effective detection was obtained. The maximum detection efficiency was further calculated, and the practical example analyzed. Results show that optical splitter can realize switch function when average photon number is smaller than 1.

关 键 词：量子密钥分发 密钥分发效率 分光选基 

分 类 号：TN309.7[电子电信—物理电子学]