Closed-loop atomic spin polarization detection based on EOAM modulation in K-Rb-^(21)Ne co-magnetometers  

作　　者：Shimiao Fan Wenfeng Fan Qi Yuan Xiaoping Li Hongyu Pei Wei Quan and Lihong Duan 范时秒;范文峰;袁琪;李晓苹;裴宏宇;全伟;段利红(School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China;National Institute of Extremely-Weak Magnetic Field Infrastructure,Hangzhou 310023,China;Institute of Large-Scale Scientific Facility,Centre for Zero Magnetic Field Science,Beihang University,Beijing 100191,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[1]School of Instrumentation and Optoelectronic Engineering,Beihang University,Beijing 100191,China [2]National Institute of Extremely-Weak Magnetic Field Infrastructure,Hangzhou 310023,China [3]Institute of Large-Scale Scientific Facility,Centre for Zero Magnetic Field Science,Beihang University,Beijing 100191,China [4]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Optics Letters》2024年第12期45-50,共6页中国光学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.62103026);the Innovation Program for Quantum Science and Technology(Nos.2021ZD0300400 and 2021ZD0300402);the China National Funds for Distinguished Young Scientists(No.61925301)。

摘　　要：We propose a high-sensitivity spin polarization detection scheme based on optical amplitude modulation in atomic co-magnetometers,which is different from the traditional configuration.A linearly polarized laser with intensity modulation interacts with electron spins,generating optical rotation angles.Through differential amplification and demodulation,atomic spin polarization information is extracted with high precision.The effectiveness of the proposed method is verified by applying external perturbations during testing.Compared to traditional detection methods,the proposed approach effectively enhances inertial measurement sensitivity.Specifically,at 1 Hz,the measurement sensitivity has improved from9.7×10^(-6)to 3.25×10^(-6)deg/(s Hz^(1/2)).Furthermore,the proposed scheme is easily integrable and conducive to future research on miniaturizing co-magnetometers and can also be applied to many other related fields.

关 键 词：atomic spin polarization detection amplitude modulation co-magnetometers inertial measurement sensitivity 

分 类 号：TM936[电气工程—电力电子与电力传动]