User-independent optical path length compensation scheme with sub-nanosecond timing resolution for a 1×N quantum key distribution network system  

作　　者：BYUNG KWON PARK MIN KI WOO YONG-SU KIM YOUNG-WOOK CHO SUNG MOON SANG-WOOK HAN 

机构地区：[1]Center for Quantum Information,Korea Institute of Science and Technology,Seoul 02792,South Korea [2]Division of Nano and Information Technology,Korea Institute of Science and Technology School,Korea University of Science and Technology,Seoul 02792,South Korea

出　　处：《Photonics Research》2020年第3期296-302,共7页光子学研究（英文版）

基　　金：National Research Foundation of Korea(2019M3E4A107866011,2019M3E4A1079777,2019R1A2C2006381);Korea Institute of Science and Technology(2E29580);ICT Research and Development Programs of MSIP/IITP(2014-3-00524);We thank the KT Corporation forproviding their deployed fiber.

摘　　要：Quantum key distribution(QKD)networks constitute promising solutions for secure communication.Beyond conventional point-to-point QKD,we developed 1×N QKD network systems with a sub-nanosecond resolution optical path length compensation scheme.With a practical plug-and-play QKD architecture and compact timing control modules based on a field-programmable gate array,we achieved long-term stable operation of a 1×64 QKD network system.Using this architecture,64 users can simultaneously share secret keys with one server,without using complex software algorithms and expensive hardware.We demonstrated the workings of a 1×4 QKD network system using the fiber network of a metropolitan area.

关 键 词：network RESOLUTION DISTRIBUTION 

分 类 号：O413[理学—理论物理] TN918[理学—物理]