稳定的低噪声自由空间量子密钥分配实验研究  

The experimental research on a stable free-space quantum key distribution system with low noise

作　　者：王金东[1] 路巍[2] 赵峰[1] 刘小宝[1] 郭邦红[1] 张静[1] 黄宇娴[1] 路轶群[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,广州510631 [2]中国科学院合肥智能机械研究所,合肥230031

出　　处：《物理学报》2008年第7期4214-4218,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(973)项目(批准号:2001CB309302);高等学校博士学科点专项科研基金(批准号:20050574001)资助的课题~~

摘　　要：基于量子密钥分配的基本原理,采用偏振短脉冲相干光源和双FM差分密钥分配的方案,进行了自由空间量子密钥分配的实验研究.该方案具有噪声低,稳定性高,误码率低等优点,为空间量子保密通信提供了一个有意义的实施方案,具有一定的实用价值和学术意义.A free-space quantum key distribution system is demonstrated experimentally which makes use of polarized coherent short laser pulses and the differential phase shift scheme with a Faraday-Michelson interferometer. The system features low noise, high stability and low bit-error rate. In the proposed experimental scheme, polarizated short laser pulse of several nanoseconds duration is made to transmit through the free space to decrease noise and a low bit-error rate less than 6% is achieved.

关 键 词：量子保密通信 量子密钥 自由空间 差分相位编码 

分 类 号：TN918[电子电信—通信与信息系统] TN929.1[电子电信—信息与通信工程]