冷镱原子光钟绝对频率测量及相关跃迁研究的进展  

Advances in absolute frequency measurement and related transitions of cold Ytterbium atomic clock

作　　者：齐启超 金涛韫 彭成权 孙常越 徐信业[1] Qi Qichao;Jin Taoyun;Peng Chengquan;Sun Changyue;Xu Xinye(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,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200241

出　　处：《仪器仪表学报》2024年第2期2-16,共15页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(62105102,11134003);国家重点研发计划项目(2016YFA0302103,2017YFF0212003,2016YFB0501601);上海市科技重大专项(2019SHZDZX01);上海市优秀学术带头人计划项目(12XD1402400)资助。

摘　　要：光学原子钟的稳定度和不确定度都已全面进入小数10-18量级,是目前最精密的时间频率测量工具之一。光学原子钟已在精密测量和基础物理研究等尖端科研领域展现出潜力,并有望重新定义时间单位“秒”。镱原子光钟因其独特的能级优势而成为了目前世界上发展最成熟、研究最广泛的光钟之一。镱原子钟跃迁的绝对频率测量和镱原子相关跃迁光谱的精密测量具有重要意义。综述了冷镱原子光钟的钟跃迁6s 21 S 0-6s6p 3P 0能级绝对频率测量的国内外进展,并介绍以7.3×10^(-16)的不确定度测量镱原子钟跃迁绝对频率的实验,测量值为518295836590863.30±0.38 Hz。综述了利用已完成绝对频率测量的镱原子光钟为基准,对镱原子的649,770和1389 nm抽运光的对应跃迁绝对频率进行精密测量的结果。At present,the stability and uncertainty of optical atomic clocks have reached the level of 10-18,making them the most precise time-frequency measurement tools.Optical atomic clocks demonstrate potential for advanced scientific research in precision measurements and fundamental physics,potentially redefining the unit of time“second”.Among optical clocks,ytterbium(Yb)atomic clocks stand out due to their unique energy level advantages,making them one of the most mature and extensively researched optical clock candidates worldwide.The absolute frequency measurement of the ytterbium atomic clock transition and the precise measurement of the ytterbium atomic correlation transition spectrum are essential.This article provides an overview of the domestic and international progress in absolute frequency measurement of 6s 21 S 0-6s6p 3P 0 clock transition of cold ytterbium atomic clocks.The experiment of East China Normal University measures the absolute frequency of Ytterbium atomic clock transition with an uncertainty of 7.3×10^(-16) is introduced whose measured value is 518295836590863.30±0.38 Hz.Additionally,we present the results of precision absolute frequency measurements of relevant repumping transitions at 649,770,and 1389 nm,which use the absolute-frequency-measured ytterbium atomic clocks as a reference.

关 键 词：镱原子 光学原子钟 绝对频率测量 精密光谱 精密测量 

分 类 号：TH714[机械工程—测试计量技术及仪器]