一种新的单光源多波长双向量子密钥分发系统  

A new multi-wavelength two-way quantum key distribution system with a single optical source

作　　者：岳孝林[1,2] 王金东[1,2] 魏正军[1,2] 郭邦红[1,2] 刘颂豪[1,2] 

机构地区：[1]华南师范大学信息光电子科技学院广东省微纳光子功能材料与器件重点实验室,广州510006 [2]华南师范大学光子信息技术广东省高校重点实验室,广州510006

出　　处：《物理学报》2012年第18期234-240,共7页Acta Physica Sinica

基　　金：国家自然科学基金重大研究计划(批准号:91121023);国家自然科学基金(批准号:61108039;60978009);国家重点基础研究发展计划(批准号:2011CBA00200)资助的课题~~

摘　　要：针对"即插即用"双向量子密钥分发系统传输效率低的实际问题,详细分析了系统低效的原因和当前的解决方案,提出了一种单光源多波长双向量子密钥分发方案.该方案采用波分复用器件作为滤波器来产生量子密钥分发所需的多波长信号.与其他多波长方案相比,该方案的优点是在实现高速多波长量子密钥分发时,不再受外界控制源调制速率和精度等性能的影响,不再带来多激光器引入的边信道攻击的缺陷,且整体系统易于集成.该方案为"即插即用"量子密钥分发系统的高效研究提供了一个新的参考方案.Lowefficiency is an important issue in ＂plug and play＂ quantum key distribution system for practical application. The inefficient reasons of system and the current solutions are analyzed. And then a new quantum key distribution scheme with multiwavelength pulses is proposed, in which a broadband optical source and the WDMs are combined to generate the optical pulses with four wave lengths. Moreover, the WDMs can also be used as a filter to extract the signal in the proposed scheme. Compared with other schemes, this scheme is highly stable, more securate and independent of the response speed of the control systems. The scheme can be used in high efficiency ＂plug and play＂ quantum key distribution system in practice.

关 键 词：量子保密通信 双向系统 瑞利散射 多波长 

分 类 号：O431.2[机械工程—光学工程] TN918[理学—光学]