The security loopholes caused by the Photon-Number-Splitting Attack could be solved by using the decoy quantum key scheme,and the security of long-distance quantum communication could be guaranteed. The principle of quantum communication was introduced in this paper. The electro-absorption modulation circuit and the laser drive circuit were designed. The 1550 nm narrow pulse was precisely controlled and generated. After the internal modulation,the decoy light pulse was successfully prepared. Its intensity was about one-third of the signal state,and the uniform optical feature was owned by the same character of the laser so as to avoid time-frequency eavesdropping,and has the advantage of adjustable intensity.
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张博文,洪占勇,盛迎接,代云启. QKD系统中基于EA电路的诱骗态实现[J].激光与红外,2019,49(2):151~155 ZHANG Bo-wen, HONG Zhan-yong, SHENG Ying-jie, DAI Yun-qi. Realization of decoy state based on EA circuit in QKD system[J]. LASER & INFRARED,2019,49(2):151~155