Design of a high-repetition rate photon source in a quantum key distribution system |
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Authors: | Jian Wang Ke Cui ChunLi Luo HongFei Zhang Lei Zhou TengYun Chen Hao Liang Ge Jin |
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Affiliation: | 1. Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China
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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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