A simple control system of quantum key distribution with high visibility

• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2012,（4）
• 页码范围: 318-320
• 页数: 3页
• 语种: 英文
• DOI: 10.1007/s11801-012-1145-9

摘要

A relatively simple plug-and-play control system of quantum key distribution (QKD) based on PCI7300 card is demonstrated,including mechanism design,key generation and key acquisition.The system works very well at the repetition frequency of 1 MHz,and the key generation rate is 100 k/s.A visibility of better than 95％ over 50 km-long fiber at 1.31 μm is obtained,which is stable under ordinary lab conditions for 24 h without any feedback control or adjustment.The presented system is a quite promising candidate to realize the QKD in the future.