High-precision alkali-atom density measurement and control methods using light absorption for dual-beam SERF magnetometers

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外文摘要：The alkali-atom density measurement method based on light absorption is highly suitable for a spin-exchange relaxation-free[SERF]atomic magnetometer because of its high-precision measurement and complete nonmagnetic interference.In this study,the optical rotation angle detection system based on polarization balance detection is utilized to realize the alkali-atom density real-time measurement without affecting magnetic field measurement.We discovered that there exists an optimal frequency detuning of the probe light,which offers the highest sensitivity in alkali-atom density measurement and the lowest susceptibility to temperature fluctuations in terms of the scale factor.In contrast to conventional light absorption measurements based on pump light,this method demonstrated a threefold improvement in alkali-atom density measurement sensitivity while remaining immune to ambient magnetic fields and incident light intensity fluctuations.Furthermore,we utilized this method to achieve closed-loop temperature control with an accuracy of 0.04℃.

外文关键词：

light absorptiontemperature measurement and controldual-beam SERF magnetometer

作者：

刘子傲、陆吉玺、胡朝晖、李晓昱、闫一凡、詹迪、李建利

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作者单位：

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

Shen Yuan Honors College,Beihang University,Beijing 100191,China

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出版年：

2024

DOI：

10.3788/COL202422.051201

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(5)