Afterpulse-like phenomenon of superconducting single photon detector in high speed quantum key distribution system

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抄録

We discuss our estimates of the performance of a superconducting single photon detector (SSPD) in a high speed quantum key distribution (QKD) system. We find that at high repetition operation reflections from the readout circuit at room temperature causes an afterpulse-like phenomenon, and drastically increases the quantum bit error rate (QBER). Such effects are not seen during low frequency operation. By using an amplifier with a small reflection coefficient S11, we succeed in reducing the afterpulse-like phenomenon and increasing a secure key rate.

収録刊行物

  • Optics Express  

    Optics Express 19(20), 19562-19571, 2011-09-26 

    Optical Society of America

各種コード

  • NII論文ID(NAID)
    120003504731
  • 本文言語コード
    ENG
  • 資料種別
    Journal Article
  • ISSN
    1094-4087
  • データ提供元
    IR 
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