锶原子光晶格钟  

Strontium optical lattice clock

作　　者：林弋戈[1,2] 方占军 Lin Yi-Ge1,2 Fang Zhan-Jun1,2. 1.(National Institute of Metrology, Beijing 100029, China） 2. （National Time and Frequency Metrology Center, Beijing 100029, China)

机构地区：[1]中国计量科学研究院,北京100029 [2]国家时间频率计量中心,北京100029

出　　处：《物理学报》2018年第16期110-130,共21页Acta Physica Sinica

基　　金：国家重点研究发展计划(批准号:2016YFF0200201;2017YFA0304404);国家自然科学基金(批准号:91336212;91436104;91736310)资助的课题~~

摘　　要：进入21世纪以来,锶原子光晶格钟经历了快速的发展,系统频移的不确定度指标已经超越现有的秒定义基准铯原子喷泉钟,进入到10^(-18)量级,体现了人类精密测量能力的最高水平,是精密测量物理的热点研究内容.本综述简要介绍了锶原子光晶格钟的发展水平;详细介绍了锶原子光晶格钟的各个组成部分和关键技术、如何进行精密光谱探测和闭环锁定以及各项系统频移的不确定度评估方法和锶原子跃迁绝对频率测量的方法等;最后简要介绍了锶光钟的应用和未来发展趋势.The strontium optical lattice clock has experienced a rapid development since the beginning of the 21st century. Its relative frequency uncertainty, on the order of 10^-18, has surpassed that of the cesium fountain clock, the current primary standard for time and frequency. This supreme level of precision reflects one of the most advanced measurement capabilities of mankind. This article reviews the current progress of the strontium optical lattice clock, and describes its key components and techniques, including high-resolution spectroscopy, close-loop operation, evaluation of system- atic shifts, and absolute frequency measurement. The applications and future outlook of the strontium clock are also summarized.

关 键 词：原子钟 光钟 光晶格 锶原子 

分 类 号：O562[理学—原子与分子物理]