超低损耗光纤在量子保密通信中的应用研究  

Ultra Low Loss Fiber and Its Application in Quantum Key Distribution System

作　　者：姜利民[1] 陈皓 JIANG Li-min;CHEN Hao(CSEPDI, Wuhan 430071, China;Coming Optical Communication China, Shanghai 200233, China)

机构地区：[1]中南电力设计院,湖北武汉430071 [2]康宁光通信中国,上海200233

出　　处：《电力信息与通信技术》2018年第4期24-28,共5页Electric Power Information and Communication Technology

摘　　要：量子保密通信技术(Quantum Key Distribution,QKD)是提升电网信息安全传输的重要手段。由于量子保密通信系统在器件上的局限性,目前只能实现百公里以内的传输距离。为提升传输距离,除了在传输设备、器件和编码技术进行优化以外,降低线路光纤衰减也是有效的技术手段之一。文章介绍了用于电力通信系统超长跨距传输中的超低损耗光纤及其在量子保密通信系统中的应用,并且通过实验验证了在量子保密通信系统中,超低损耗光纤相比于常规G.652光纤,可实现更长的传输距离或更高的成码率。QKD system is an important solution to achieve absolute safe information transmission in power utilities. However, the transmission distance is limited to less than hundred kilometers by devices constrains. Besides optimizing QKD transmission system and protocol, lowering the fiber loss is also a good way to extend the system reach. In this paper we introduced ultra-low loss（ULL） fiber, which is widely used in ultra long span systems in State Grid UHV projects, and also verified its transmission advantages in QKD system via lab tests. Test results shows ULL fiber can achieve longer transmission distance and higher bit rate than legacy G.652 fiber.

关 键 词：超低损耗光纤 量子密钥分发 传输距离 共纤传输 

分 类 号：TN918[电子电信—通信与信息系统]