Dynamic range and linearity improvement for zero-field single-beam atomic magnetometer  

作　　者：Kai-Feng Yin Ji-Xi Lu Fei Lu Bo Li Bin-Quan Zhou Mao Ye 尹凯峰;陆吉玺;逯斐;李博;周斌权;叶茂(School of Instrumentation Science and Optoelectronics Engineering,Beihang University,Beijing 100191,China;Research Institute for Frontier Science,Beihang University,Beijing 100191,China;Beihang Hangzhou Innovation Institute Yuhang,Xixi Octagon Ciy,Hangzhou 310023,China)

机构地区：[1]School of Instrumentation Science and Optoelectronics Engineering,Beihang University,Beijing 100191,China [2]Research Institute for Frontier Science,Beihang University,Beijing 100191,China [3]Beihang Hangzhou Innovation Institute Yuhang,Xixi Octagon Ciy,Hangzhou 310023,China

出　　处：《Chinese Physics B》2022年第11期284-290,共7页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China(Grant No.2018YFB2002405);the National Natural Science Foundation of China(Grant No.61903013)。

摘　　要：Zero-field single-beam atomic magnetometers with transverse parametric modulation for ultra-weak magnetic field detection have attracted widespread attention recently.In this study,we present a comprehensive response model and propose a modification method of conventional first harmonic response by introducing the second harmonic correction.The proposed modification method gives improvement in dynamic range and reduction of linearity error.Additionally,our modification method shows suppression of response instability caused by optical intensity and frequency fluctuations.An atomic magnetometer with single-beam configuration is built to compare the performance between our proposed method and the conventional method.The results indicate that our method’s magnetic field response signal achieves a 5-fold expansion of dynamic range from 2 nT to 10 nT,with the linearity error decreased from 5%to 1%.Under the fluctuations of 5%for optical intensity and±15 GHz detuning of frequency,the proposed modification method maintains intensityrelated instability less than 1%and frequency-related instability less than 8%while the conventional method suffers 15%and 38%,respectively.Our method is promising for future high-sensitive and long-term stable optically pumped atomic sensors.

关 键 词：atomic magnetometer dynamic range linearity error response signal stability 

分 类 号：TM936[电气工程—电力电子与电力传动]