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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/47439

Title: Afterpulse-like phenomenon of superconducting single photon detector in high speed quantum key distribution system
Authors: Fujiwara, M. Browse this author
Tanaka, A. Browse this author
Takahashi, S. Browse this author
Yoshino, K. Browse this author
Nambu, Y. Browse this author
Tajima, A. Browse this author
Miki, S. Browse this author
Yamashita, T. Browse this author
Wang, Z. Browse this author
Tomita, A. Browse this author →KAKEN DB
Sasaki, M. Browse this author
Issue Date: 26-Sep-2011
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 19
Issue: 20
Start Page: 19562
End Page: 19571
Publisher DOI: 10.1364/OE.19.019562
Abstract: 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.
Rights: ©2011 Optical Society of America
Type: article
URI: http://hdl.handle.net/2115/47439
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 富田 章久

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