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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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