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Wavelength division multiplexing quantum key distribution network using a modified plug-and-play system

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Abstract

This paper proposes and analyzes a multi-user wavelength division multiplexing–quantum key distribution (WDM-QKD) network that employs a modified plug-and-play system; this system employs a multi-wavelength laser diode to generate wavelength pulses for Bobs and utilizes a single phase modulator to modulate the returned pulses for all users. Benefitting from the time delay and delay line in Bobs, the returned pulses remain independent of Rayleigh backward scattering caused by strong pulse signals. Numerical simulations and results show that the key rate per user maintains a high level compared with a point-to-point link, because the communications between Alice and four Bobs can be carried out simultaneously.

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Acknowledgments

This work is financially supported by National Cryptography Development Foundation of China (Grant No. MMJJ201401011), Science and Technology Program of Guangzhou, China (Grant No. 2014J4100050), and Industry-Education-Research Cooperation Project of Guangdong Province and Ministry of Education of China (Grant No. 2012B091100063).

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Authors and Affiliations

  1. Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, 510006, China

    Guangming Cheng, Banghong Guo, Chengxian Zhang, Jianjun Guo & Ronghua Fan

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  1. Guangming Cheng
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  2. Banghong Guo
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  3. Chengxian Zhang
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  4. Jianjun Guo
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  5. Ronghua Fan
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Correspondence to Banghong Guo.

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Cheng, G., Guo, B., Zhang, C. et al. Wavelength division multiplexing quantum key distribution network using a modified plug-and-play system. Opt Quant Electron 47, 1809–1817 (2015). https://doi.org/10.1007/s11082-014-0039-4

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  • DOI: https://doi.org/10.1007/s11082-014-0039-4

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