Plug & Play quantum cryptography system

Plug & Play 양자암호 시스템

  • Published : 2007.05.25


We present a auto compensating quantum key distribution system based on optical fiber at 1550nm. In the quantum key transmission system, main control board and phase modulation driving board are fabricated for auto controlling quantum key distribution(QKD). We tested the single photon counts per dark counts for a single photon detector, quantum key distribution rate($R_{sift}$) and the quantum bit error rate (QBER). Quantum bit error rate of 3.5% in 25km QKD is obtained. This system is commercially available.

1550nm의 파장대를 이용하는 자동 위상보정 양자암호 시스템을 소개한다. 양자키 분배 시스템에서 자동위상보정된 양자키 분배를 위한 메인 컨트롤보드와 phase modulator를 제어할 수 있는 보드를 제작하였고, 단일광자검출기를 위한 dark count당 photon count, quantum key distribution rate($R_{sift}$)와 quantum bit error rate(QBER)값을 측정하였다. 이 시스템은 25km의 광섬유상에서 quantum bit error rate(QBER) 3.5%의 결과값을 얻었고, 이는 상용화가 가능할 것으로 예상된다.



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