| Autor: |
Wang S, Chen W, Yin ZQ, He DY, Hui C, Hao PL, Fan-Yuan GJ, Wang C, Zhang LJ, Kuang J, Liu SF, Zhou Z, Wang YG, Guo GC, Han ZF |
| Jazyk: |
angličtina |
| Zdroj: |
Optics letters [Opt Lett] 2018 May 01; Vol. 43 (9), pp. 2030-2033. |
| DOI: |
10.1364/OL.43.002030 |
| Abstrakt: |
Quantum key distribution (QKD) provides an attractive solution for secure communication. However, channel disturbance severely limits its application when a QKD system is transferred from the laboratory to the field. Here a high-speed Faraday-Sagnac-Michelson QKD system is proposed that can automatically compensate for the channel polarization disturbance, which largely avoids the intermittency limitations of environment mutation. Over a 50 km fiber channel with 30 Hz polarization scrambling, the practicality of this phase-coding QKD system was characterized with an interference fringe visibility of 99.35% over 24 h and a stable secure key rate of 306 k bits/s over seven days without active polarization alignment. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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