Closely interleaved self-comparison method applied to precise measurement  

作　　者：邹凡 魏荣 董日昌 陈婷婷 王文丽 王育竹 

机构地区：[1]Key Laboratory of Quantum Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Optics Letters》2016年第8期35-39,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.61275204 and 91336105

摘　　要：A self-comparison method with closely interleaved switching states is analyzed and used to evaluate some type-B uncertainties of an ^87Rb atomic fountain clock. Free from additional frequency reference, the method can be applied to a running fountain to reach a precision beyond its uncertainty. A verification experiment proves an uncertainty of 9.2 × 10^-16 at an averaging time of 242500 s. Further, the method is applied to measure light shift, and no visible relative frequency shift is found in the fountain within the uncertainty of 2.1 × 10^-15. When applied to the evaluation of a cold collisional shift, the result gives a -2.2 × 10^-15 shift with a 9.5 × 10^-16 uncertainty.A self-comparison method with closely interleaved switching states is analyzed and used to evaluate some type-B uncertainties of an ^87Rb atomic fountain clock. Free from additional frequency reference, the method can be applied to a running fountain to reach a precision beyond its uncertainty. A verification experiment proves an uncertainty of 9.2 × 10^-16 at an averaging time of 242500 s. Further, the method is applied to measure light shift, and no visible relative frequency shift is found in the fountain within the uncertainty of 2.1 × 10^-15. When applied to the evaluation of a cold collisional shift, the result gives a -2.2 × 10^-15 shift with a 9.5 × 10^-16 uncertainty.

关 键 词：CISC uncertainty clock verification switching deviation precise visible running switched 

分 类 号：TM935.115[电气工程—电力电子与电力传动]