E-resources
Peer reviewed
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Park, Byung Kwon; Lee, Min Soo; Woo, Min Ki; Kim, Yong-Su; Han, Sang-Wook; Moon, Sung
Science China. Physics, mechanics & astronomy, 06/2017, Volume: 60, Issue: 6Journal Article
We develop a quantum key distribution （QKD） system with fast active optical path length compensation. A rapid and reliable active optical path length compensation scheme is proposed and applied to a plug-and-play QKD system. The system monitors changes in key rates and controls it is own operation automatically. The system achieves its optimal performance within three seconds of operation, which includes a sifted key rate of 5.5 kbps and a quantum bit error rate of less than 2% after an abrupt temperature variation along the 25 km quantum channel. The system also operates well over a 24 h period while completing more than 60 active optical path length compensations.
