摘要
高精度的时间传递技术已经广泛地应用在守时授时、导航定位、科学研究等各个领域。量子时间传递技术利用频率纠缠脉冲作为时间信号的载体,结合高精度的量子测量技术可以极大地提高时间传递精度。由于频率纠缠脉冲自身的高度关联性,量子时间传递技术具有更高的安全性。本文在9.76 km的实地光纤中开展了双向量子时间传递实验研究,得到的时间传递稳定度在平均时间是10 s时为1.55 ps,平均时间是20480 s时为92 fs。飞秒量级的双向量子时间传递结合其安全性优势,有望在高精度的中长途传递系统中获得广泛应用。
High-precision time transfer technology has been widely applied in a variety of fields,such as punctual timing,navigation and positioning,scientific research,and so on.Quantum time transfer technology,which uses frequency entangled pulse as the carrier of time signals,and combined with high-precision quantum measurement technologies,can greatly improve the time transfer accuracy.Due to the high correlation of the frequency entangled pulse itself,quantum time transfer technology has higher security.We carry out the two-way quantum time transfer experiment in a 9.76 km solid fiber.The time transfer stability is 1.55 ps over 10 s,and92 fs over 20480 s.The femtosecond-scale two-way quantum time transfer is expected to be widely used in high-precision medium and long distant transmission system.
作者
侯飞雁
权润爱
项晓
靳亚晴
董瑞芳
刘涛
张首刚
HOU Fei-yan;QUAN Run-ai;XIANG Xiao;JIN Ya-qing;DONG Rui-fang;LIU Tao;ZHANG Shou-gang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Time and Frequency Primary Standards,Chinese Academy of Sciences,Xi’an 710600,China;School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 101048,China)
出处
《时间频率学报》
CSCD
2020年第4期253-261,共9页
Journal of Time and Frequency
基金
国家自然科学基金资助项目(12033007,61875205,61801458,91836301)
中国科学院前沿科学重点研究资助项目(QYZDB-SSWSLH007)
中国科学院“西部之光”人才培养计划“西部青年学者”B类资助项目(XAB2019B15,XAB2019B17)
中国科学院战略性先导科技专项C类资助项目(XDC07020200)
中国科学院重点资助项目(ZDRW-KT-2019-1-0103)
广东省重点研发资助项目(2018B030325001)。
关键词
量子时间传递
实地光纤
频率纠缠源
色散消除
quantum time transfer
solid fiber
frequency entangled source
dispersion cancellation
