QKD system with fast active optical path length compensation
| Autor: | Sung Moon, Min Soo Lee, Byung Kwon Park, Yong-Su Kim, Min Ki Woo, Sang-Wook Han |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Computer science
Plug and play General Physics and Astronomy Quantum channel Quantum key distribution 01 natural sciences Compensation (engineering) 010309 optics 0103 physical sciences Key (cryptography) Electronic engineering Quantum bit error rate 010306 general physics Field-programmable gate array Optical path length |
| Zdroj: | Science China Physics, Mechanics & Astronomy. 60 |
| ISSN: | 1869-1927 1674-7348 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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