摘要
We experimentally study the dynamic characteristics of a miniaturized spin-exchange relaxation-free(SERF) magnetometer based on uniform light field. The ceramic ferrule is used to expand the Gaussian beam to improve light intensity uniformity, while the volume of the sensor is also reduced. This scheme makes the magnetometer have better sensitivity when the detected light intensity is less than 3.16 m W/cm^(2) at 120℃. When the temperature rises to 150℃ the sensitivity under the action of uniform light field is 18.5 f T/Hz^(1/2). The bandwidth of the sensor remains at the original level and meets application needs. The proposed structure improves transverse polarization uniformity within the miniaturized sensor, which is ideal for the magnetoencephalography and magnetocardiography imaging systems.
作者
李佳洁
房秀杰
李任杰
陈宝栋
翟跃阳
刘颖
Jiajie Li;Xiujie Fang;Renjie Li;Baodong Chen;Yueyang Zhai;Ying Liu(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;School of Physics,Beihang University,Beijing 100191,China)
基金
the National Natural Science Foundation of China (Grant No. 62003020)。
