冷镱原子光钟的研究进展  

Progress of Cold Ytterbium Optical Clocks

作　　者：周敏[1] 艾迪 骆莉梦 谯皓 张爽 徐信业[1] ZHOU Min;AI Di;LUO Li-meng;QIAO Hao;ZHANG Shuang;XU Xin-ye(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China)

机构地区：[1]华东师范大学精密光谱科学与技术国家重点实验室,上海200062

出　　处：《导航定位与授时》2019年第1期1-6,共6页Navigation Positioning and Timing

基　　金：国家重点研究发展规划(973计划)(2016YFA0302103;2017YFF0212003;2016YFB0501601;2012CB821302);国家高技术研究发展计划(863)计划(2014AA123401);国家自然科学基金重点项目(11134003);上海市优秀带头人计划(12XD1402400)

摘　　要：光学原子钟是一类基于原子或离子中光频跃迁的新型原子钟,近年来已成为研究热点并获得了重大进展,其性能已优于最好的铯基准微波钟,可满足更高精度定位、导航与授时应用的需求。阐述了冷镱原子光钟的基本工作原理及构成,分析了系统不确定度和稳定度等性能指标,给出了目前世界范围内的发展现状,介绍了华东师范大学的研究进展,其中一台光钟的系统不确定度评估为1.7×10^(-16),稳定度为2.9×10^(-15)/τ^(1/2),在5000s平均后稳定度优于4×10^(-17)。最后简要对冷镱原子光钟的应用前景进行了展望。Optical atomic clocks are a new class of atomic clocks based on optical transitions lying in the atoms or ions.They have become a hot topic and huge leaps forward have been made in recent years.Optical atomic clocks have been demonstrated to outperform the best primary Cs standards in terms of frequency uncertainty and stability,satisfying the applications of positioning,navigation and timing with higher precision.As for cold ytterbium optical clocks,the basic operation principle and physical components are described.The systematic uncertainty and instability are discussed.The present status in the world is introduced and the progress at East China Normal University is presented with systematic uncertainty of 1.7×10^-16 in an optical clock therein.The fractional frequency instability given by the Allan standard deviation follows the dependence 2.9×10^-15/√τ,which falls below 4×10^-17 after a 5000s averaging.Finally,an outlook to the application is briefly prospected.

关 键 词：光学原子钟 镱原子 频率不确定度 频率稳定度 

分 类 号：TB939[一般工业技术—计量学]