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

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

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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 ellip-tically polarized laser beams.The light-intensity noise is suppressed by differential detection technology,so a higher sen-sitivity is obtained compared with our previous work.The three-axis average sensitivities of the atomic magnetometer simultaneously reached 14 fT/Hz1/2 along the x axis,11 fT/Hz1/2 along the y axis,and 25 fT/Hz1/2 along the z axis.Furthermore,the atomic magnetometer's dynamic range was further improved to 150 nT,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.

three-axis atomic magnetometerelliptically polarized laserclosed-loop control

闫业广、陆吉玺、王锟、逯斐、张少文、刘子傲、李晓昱、周斌权

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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

2024

10.3788/COL202422.101201

中国光学快报(英文版)
中国光学学会 中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD
影响因子：1.305
ISSN：1671-7694
年,卷(期)：2024.22(10)