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Design of a high-repetition rate photon source in a quantum key distribution system

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Abstract

Photon source with high-repetition quantum message transmission is needed in the quantum key distribution (QKD) system for long distance and high-repetition rate. We design high-repetition-rate weak coherent light by applying a practical QKD system with decoy states and polarization coding including an FPGA-based true random number generator, narrow pulse shaping under the modulation of high-speed true random number as well as its laser driver. The test indicates that the repetition rate of such light can attain a high performance of 650 MHz, pulse width less than 300 ps, stability of pulse amplitude better than 5%, and extinction rate better than 1000:1.

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Authors and Affiliations

  1. Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China

    Jian Wang, Ke Cui, ChunLi Luo, HongFei Zhang, Lei Zhou, TengYun Chen, Hao Liang & Ge Jin

Authors
  1. Jian Wang
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  2. Ke Cui
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  3. ChunLi Luo
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  4. HongFei Zhang
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  5. Lei Zhou
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  6. TengYun Chen
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  7. Hao Liang
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  8. Ge Jin
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Correspondence to Jian Wang.

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Wang, J., Cui, K., Luo, C. et al. Design of a high-repetition rate photon source in a quantum key distribution system. Sci. China Inf. Sci. 56, 1–7 (2013). https://doi.org/10.1007/s11432-012-4671-y

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  • DOI: https://doi.org/10.1007/s11432-012-4671-y

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