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학술지 High-Speed and High-Performance Polarization based Quantum Key Distribution System without Side Channel Effects caused by Multiple Lasers
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저자
고해신, 최병석, 최중선, 김갑중, 김종회, 윤천주
발행일
201803
출처
Photonics Research, v.6 no.3, pp.214-219
ISSN
2327-9125
출판사
Optical Society of America (OSA)
DOI
https://dx.doi.org/10.1364/PRJ.6.000214
초록
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 fieldprogrammable gate array signal processing.
KSP 제안 키워드
Array Signal Processing, Current condition, DC bias current, Distribution System, Field Programmable Gate Arrays(FPGA), Filtering technique, High Speed, High performance, Intensity fluctuation, Laser diode(LD), Random bit generation