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A new multi-wavelength two-way quantum key distribution system with a single optical source

Yue Xiao-Lin Wang Jin-Dong Wei Zheng-Jun Guo Bang-Hong Liu Song-Hao

A new multi-wavelength two-way quantum key distribution system with a single optical source

Yue Xiao-Lin, Wang Jin-Dong, Wei Zheng-Jun, Guo Bang-Hong, Liu Song-Hao
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  • PDF Downloads:  423
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Publishing process
  • Received Date:  21 February 2012
  • Accepted Date:  15 March 2012
  • Published Online:  05 September 2012

A new multi-wavelength two-way quantum key distribution system with a single optical source

  • 1. Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Photoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China;
  • 2. Laboratory of Quantum Information Technology, South China Normal University, Guangzhou 510006, China
Fund Project:  Project supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. 91121023), the National Natural Science Foundation of China (Grant Nos. 61108039, 60978009), and the National Basic Research Program of China (Grant No. 2011CBA00200).

Abstract: Low-efficiency is an important issue in "plug and play" quantum key distribution system for practical application. The inefficient reasons of system and the current solutions are analyzed. And then a new quantum key distribution scheme with multi-wavelength pulses is proposed, in which a broadband optical source and the WDMs are combined to generate the optical pulses with four wavelengths. Moreover, the WDMs can also be used as a filter to extract the signal in the proposed scheme. Compared with other schemes, this scheme is highly stable, more securate and independent of the response speed of the control systems. The scheme can be used in high efficiency "plug and play" quantum key distribution system in practice.

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