Park, Byung Kwon Lee, Min Soo Woo, Min Ki Kim, Yong-Su Han, Sang-Wook Moon, Sung 2024-01-20T01:31:15Z 2024-01-20T01:31:15Z 2021-09-04 2017-06 1674-7348 https://pubs.kist.re.kr/handle/201004/122692 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. English SCIENCE PRESS QUANTUM KEY DISTRIBUTION FIELD-TEST DISTRIBUTION NETWORK CRYPTOGRAPHY FIBER PLUG AREA QKD system with fast active optical path length compensation Article 10.1007/s11433-017-9026-8 1 SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY, v.60, no.6 SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 60 6 scie scopus 000402890000002 2-s2.0-85018574376 Physics, Multidisciplinary Physics Article QUANTUM KEY DISTRIBUTION FIELD-TEST DISTRIBUTION NETWORK CRYPTOGRAPHY FIBER PLUG AREA quantum key distribution optical path length compensation plug and play field programmable gate array