A new synchronization scheme based on time division multiplexing and wavelength division multiplexing technology for practical quantum key distribution system |
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| Authors: | Zhong Ping-Ping Zhang Hua-Ni Wang Jin-Dong Qin Xiao-Juan Wei Zheng-Jun Chen Shuai Liu Song-Hao |
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| Affiliation: | Key Laboratory of Photonic Information Technology of Guangdong Higher Education Institutes SIPSE & LQIT, South China Normal University, Guangzhou 510006, China; Guangdong Radio & TV University, Guangzhou 510091, China |
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| 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. |
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| Keywords: | quantum key distribution clock synchronization wavelength division multiplexing time division multiplexing |
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