自适应光纤量子保密通信系统  

Self-adpated Quantum Key Distribution All-fiber System

作　　者：林一满[1] 路轶群[1] 梁瑞生[1] 路洪[2] 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,广东广州510006 [2]佛山科学技术学院光电子与物理学系,广东佛山528000

出　　处：《光电子．激光》2007年第6期687-689,共3页Journal of Optoelectronics·Laser

基　　金：国家"973"计划资助项目(2001CB309300);广州市资助项目(1999-02-035-01)

摘　　要：在双M-Z干涉仪系统上采用跟踪相位变化适时进行密钥分配,实现了80 km稳定的量子保密通信,误码率≈6.0%,50 km以下误码率<3.5%,稳定时间达数天,并且通过局域网实现了密钥分发和文档传送。该方案用于其它量子密钥分配(QKD)系统也可提高稳定性,向实用化又迈进了一步。By tracking phase drift and distributing key at suitable times, the quantum key distribution based on double M-Z interferometer was performed over a fiber length of 80 km with a quantum bit-error rate of 6%, and it had been working stably for several days. In addition,we demonstrate that the quantum bit-error rate is less than 3.5^ within a fiber length of 50 km. Through the local-area network,the key exchange and document transmission were achieved. The scheme applicable to other QKD systems can also improve the stability of interference,which has made progress in the practical application.

关 键 词：量子保密通信 跟踪相位变化 双M-Z干涉仪 

分 类 号：TN918[电子电信—通信与信息系统]