中国物理B ›› 2011, Vol. 20 ›› Issue (5): 50307-050307.doi: 10.1088/1674-1056/20/5/050307

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A new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology for practical quantum key distribution system

秦晓娟1, 钟平平2, 张华妮2, 王金东2, 魏正军2, 陈帅2, 刘颂豪2   

  1. (1)Guangdong Radio & TV University, Guangzhou 510091, China; (2)Key Laboratory of Photonic Information Technology of Guangdong Higher Education Institutes SIPSE & LQIT, South China Normal University, Guangzhou 510006, China
  • 收稿日期:2010-07-11 修回日期:2010-11-22 出版日期:2011-05-15 发布日期:2011-05-15
  • 基金资助:
    Project supported by the Key Projects in the Guangzhou Science & Technology Pillar Program of China (Grant No. 2008Z1-D501), the Guangdong Key Technologies Research & Development Program of China (Grant No. 2007B010400009), the Guangdong Polytechnic Insti

A new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology for practical quantum key distribution system

Zhong Ping-Ping(钟平平)a), Zhang Hua-Ni(张华妮) a), Wang Jin-Dong(王金东)a)†, Qin Xiao-Juan(秦晓娟)b), Wei Zheng-Jun(魏正军) a), Chen Shuai(陈帅)a), and Liu Song-Hao(刘颂豪)a)   

  1. a Key Laboratory of Photonic Information Technology of Guangdong Higher Education Institutes SIPSE & LQIT, South China Normal University, Guangzhou 510006, China; b Guangdong Radio & TV University, Guangzhou 510091, China
  • Received:2010-07-11 Revised:2010-11-22 Online:2011-05-15 Published:2011-05-15
  • Supported by:
    Project supported by the Key Projects in the Guangzhou Science & Technology Pillar Program of China (Grant No. 2008Z1-D501), the Guangdong Key Technologies Research & Development Program of China (Grant No. 2007B010400009), the Guangdong Polytechnic Institute Scientific Research Fund, China (Grant No. 0901), and the Key Laboratory Program of Quantum Information of Chinese Academy of Sciences.

摘要: Three clock synchronization schemes for a quantum key distribution system are compared experimentally through the outdoor fibre and the interaction physical model of the the clock signal and the the quantum signal in the quantum key distribution system is analysed to propose a new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology to reduce quantum bits error rates under some transmission rate conditions. The proposed synchronization scheme can not only completely eliminate noise photons from the bright background light of the the clock signal, but also suppress the fibre nonlinear crosstalk.

关键词: quantum key distribution, clock synchronization, wavelength division multiplexing, time division multiplexing

Abstract: Three clock synchronization schemes for a quantum key distribution system are compared experimentally through the outdoor fibre and the interaction physical model of the the clock signal and the the quantum signal in the quantum key distribution system is analysed to propose a new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology to reduce quantum bits error rates under some transmission rate conditions. The proposed synchronization scheme can not only completely eliminate noise photons from the bright background light of the the clock signal, but also suppress the fibre nonlinear crosstalk.

Key words: quantum key distribution, clock synchronization, wavelength division multiplexing, time division multiplexing

中图分类号:  (Quantum information)

  • 03.67.-a
03.67.Hk (Quantum communication) 42.50.Ex (Optical implementations of quantum information processing and transfer)