Investigation of the nonlinear CPT spectrum of ^87Rb and its application for large dynamic magnetic measurement  

作　　者：徐迟 王时光 胡勇 冯焱颖 王力军 

机构地区：[1]Department of Physics, Tsinghua University, Beijing 100084, China [2]Joint Institute for Measurement Science, Tsinghua University, Beijing 100084, China [3]State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Physics B》2017年第6期152-156,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.61473166);China Postdoctoral Science Foundation(Grant No.014M560958)

摘　　要：The coherent population trapping（CPT） phenomenon has found widespread application in quantum precision measurements. Various designs based on the narrow resonant spectrum corresponding to the linear Zeeman effect have been demonstrated to achieve high performance. In this article, the nonlinear Zeeman split of the CPT spectrum of ^87Rb in the lin｜｜lin setup is investigated. We observe re-split phenomenon for both magnetic sensitive and magnetic insensitive CPT resonant lines at a large magnetic field. The re-split in the magnetic sensitive lines raises a practical problem to magnetometers worked in the lin｜｜lin setup while the other one shows a good potential for applications in large magnetic field. We propose a design based on the nonlinear split of the magnetic insensitive lines and test its performance. It provides a much larger measurement range compared to the linear one, offering an option for atomic magnetometers where a large dynamic range is preferred.The coherent population trapping（CPT） phenomenon has found widespread application in quantum precision measurements. Various designs based on the narrow resonant spectrum corresponding to the linear Zeeman effect have been demonstrated to achieve high performance. In this article, the nonlinear Zeeman split of the CPT spectrum of ^87Rb in the lin｜｜lin setup is investigated. We observe re-split phenomenon for both magnetic sensitive and magnetic insensitive CPT resonant lines at a large magnetic field. The re-split in the magnetic sensitive lines raises a practical problem to magnetometers worked in the lin｜｜lin setup while the other one shows a good potential for applications in large magnetic field. We propose a design based on the nonlinear split of the magnetic insensitive lines and test its performance. It provides a much larger measurement range compared to the linear one, offering an option for atomic magnetometers where a large dynamic range is preferred.

关 键 词：coherent population trapping nonlinear Zeeman effect large dynamic magnetometer 

分 类 号：O562[理学—原子与分子物理]