One to many QKD Network System Using Polarization-Wavelength Division Multiplexing

The quantum key distribution (QKD) research, which is drawing attention as the next secure communication, is actively expanding from point to point system to network architecture. In QKD network system, it is important to increase the number of users who can securely communicate. Up to date, a wavel...

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Bibliographic Details
Published in:IEEE access 2020-01, Vol.8, p.1-1
Main Authors: Woo, Min Ki, Park, Byung Kwon, Kim, Yong-Su, Cho, Young-Wook, Jung, Hojoong, Lim, Hyang-Tag, Kim, Sangin, Moon, Sung, Han, Sang-Wook
Format: Article
Language:English
Subjects:
Arrayed waveguide gratings
Avalanche photodiodes
Channels
Computer architecture
Computer networks
Crosstalk
Cryptography
Field tests
Optical fiber networks
Optical interferometry
Polarization
Polarization division multiplexing
Quantum cryptography
Quantum key distribution network
Servers
Wave division multiplexing
Wavelength division multiplexing
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Summary:The quantum key distribution (QKD) research, which is drawing attention as the next secure communication, is actively expanding from point to point system to network architecture. In QKD network system, it is important to increase the number of users who can securely communicate. Up to date, a wavelength division multiplexing (WDM) architecture has successfully expanded the number of channels without significant system loss, but there is a limitation of increasing channels considering the range of telecommunication wavelength and crosstalk noise, etc. In this paper, we propose a polarizing division method that increases user channels independently of wavelengths. The proposed architecture can increase the number of wavelength multiplexed channels by a multiple of the polarization number. We identify the issues in the QKD network system that may occur when using polarization and wavelengths simultaneously, then provide solutions and optimize the system operation accordingly. Finally, we describe a field test result of a one to many QKD network system that shows successful key exchange with 3% QBER.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.3032992