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 language | English |
|---|---|
| Pages (from-to) | 296-302 |
| Number of pages | 7 |
| Journal | Photonics Research |
| Volume | 8 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 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