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Afterpulse-like phenomenon of superconducting single photon detector in high speed quantum key distribution system
| 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)
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Submitter: 富田 章久
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