High-speed and high-performance polarization-based quantum key distribution system without side channel effects caused by multiple lasers

被引：17
作者：
Ko, Heasin [1 ]
Choi, Byung-Seok [1 ]
Choe, Joong-Seon [1 ]
Kim, Kap-Joong [1 ]
Kim, Jong-Hoi [1 ]
Youn, Chun Ju [1 ,2 ]
机构：
[1] Elect & Telecommun Res Inst, Photon Wireless Convergence Components Res Div, Daejeon 34129, South Korea
[2] Univ Sci & Technol, Sch Adv Device Technol, Daejeon 34113, South Korea
来源：
PHOTONICS RESEARCH | 2018年 / 6卷 / 03期
关键词：
Quantum cryptography - Array processing - Polarization;
D O I：
10.1364/PRJ.6.000214
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Side channel effects such as temporal disparity and intensity fluctuation of the photon pulses caused by random bit generation with multiple laser diodes in high-speed polarization-based BB84 quantum key distribution (QKD) systems can be eliminated by increasing the DC bias current condition. However, background photons caused by the spontaneous emission process under high DC bias current degrade the performance of QKD systems. In this study, we investigated the effects of spontaneously emitted photons on the system performance in a high-speed QKD system at a clock rate of 400 MHz. Also, we show further improvements in the system performance without side channel effects by utilizing the temporal filtering technique with real-time field-programmable gate array signal processing. (c) 2018 Chinese Laser Press
引用
收藏
页码：214 / 219
页数：6
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