High-sensitivity closed-loop three-axis atomic magnetometer using two elliptically polarized laser beams  

作　　者：Yeguang Yan Jixi Lu Kun Wang Fei Lu Shaowen Zhang Ziao Liu Xiaoyu Li and Binquan Zhou 闫业广;陆吉玺;王锟;逯斐;张少文;刘子傲;李晓昱;周斌权(Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology,Ministry of Education,School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology,Hangzhou Innovation Institute,Beihang University,Hangzhou 310051,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[1]Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology,Ministry of Education,School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China [2]Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology,Hangzhou Innovation Institute,Beihang University,Hangzhou 310051,China [3]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Optics Letters》2024年第10期39-45,共7页中国光学快报（英文版）

基　　金：supported by the Innovation Program for Quantum Science and Technology(Nos.2021ZD0300500 and 2021ZD0300502)。

摘　　要：The high-sensitivity three-axis detection of magnetic fields is widely used in various applications.Our study demonstrates an atomic magnetometer detecting vector magnetic field,of which the core components are one glass cell and two elliptically polarized laser beams.The light-intensity noise is suppressed by differential detection technology,so a higher sensitivity is obtained compared with our previous work.The three-axis average sensitivities of the atomic magnetometer simultaneously reached 14 fT/Hz^(1/2)along the x axis,11 f T/Hz^(1/2)along the y axis,and 25 fT/Hz^(1/2)along the z axis.Furthermore,the atomic magnetometer's dynamic range was further improved to 150 n T,and its bandwidth was increased to over 200 Hz using a closed-loop control system.The proposed three-axis atomic magnetometer with a large dynamic range and a wide bandwidth holds great promise for biomagnetic measurement in a more challenging environment.

关 键 词：three-axis atomic magnetometer elliptically polarized laser closed-loop control 

分 类 号：O562[理学—原子与分子物理]