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

Byung Kwon Park, Min K.I. Woo, Yong Su Kim, Young Wook Cho, Sung Moon, Sang Wook Han

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)296-302
Number of pages7
JournalPhotonics Research
Volume8
Issue number3
DOIs
Publication statusPublished - 2020 Mar 1

Bibliographical note

Funding Information:
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). Acknowledgment. We thank the KT Corporation for providing their deployed fiber.

Funding Information:
Funding. 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).

Publisher Copyright:
© 2020 Chinese Laser Press

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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