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

Title
User-independent optical path length compensation scheme with sub-nanosecond timing resolution for a 1×N quantum key distribution network system
Authors
문성욱한상욱김용수조영욱박병권우민기
Issue Date
2020-03
Publisher
Photonics Research
Citation
VOL 8, NO 3-302
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.
URI
http://pubs.kist.re.kr/handle/201004/71010
ISSN
2327-9125
Appears in Collections:
KIST Publication > Article
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