期刊
IEEE ACCESS
卷 8, 期 -, 页码 194007-194014出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2020.3032992
关键词
Wavelength division multiplexing; Avalanche photodiodes; Cryptography; Optical fiber networks; Arrayed waveguide gratings; Servers; Optical interferometry; Quantum cryptography; quantum key distribution network; polarization division multiplexing
资金
- Korea Institute of Science and Technology [2E30620]
- National Research Foundation of Korea [2019 M3E4A107866011, 2019M3E4A1079777, 2019R1A2C2 006381]
- Institute for Information and Communications Technology Promotion [2020-0-00947, 2020-0-00972]
- Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [2020-0-00947-001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 article, 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.
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