One to Many QKD Network System Using Polarization-Wavelength Division Multiplexing
- One to Many QKD Network System Using Polarization-Wavelength Division Multiplexing
- 문성욱; 한상욱; 김용수; 조영욱; 정호중; 임향택; 박병권; 우민기; 김상인
- Issue Date
- IEEE Access
- VOL 8-194014
- 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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- KIST Publication > Article
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