A High Sensitivity Laser-Pumped Cesium Magnetometer  

作　　者：HUANG Kai-Kai LI Nan LU Xuan-Hui 黄凯凯;李楠;陆璇辉(Institute of Optics,Department of Physics,Zhejiang University,Hangzhou 310027)

机构地区：[1]Institute of Optics,Department of Physics,Zhejiang University,Hangzhou 310027

出　　处：《Chinese Physics Letters》2012年第10期18-20,共3页中国物理快报（英文版）

基　　金：Supported in part by the National Basic Research Program of China under Grant No 2012CB921602;the National Natural Science Foundation of China under Grant Nos 10874012,10974177;the Program of International Science and Technology Cooperation of China under Grant No 2010DFA04690。

摘　　要：An atomic magnetometer based on optically detected magnetic resonance is investigated and demonstrated experimentally.We build an 894 nm external cavity diode laser which is frequency locked to the F=4→F'=3 transition of Cs D_(1) line with DAVLL spectroscopy.With the phase-locked loop,the frequency of the rf coils is actively locked to the Larmor frequency and the magnetometer tracks the magnetic field variations in a phase coherent manner.An ultimate sensitivity of 19 fT/Hz^(1/2) and an intrinsic sensitivity of 8.6 pT/Hz^(1/2) in the magnetic environment which is close to geomagnetic field have been achieved with the spatial resolution smaller than 2 cm.

关 键 词：MAGNETOMETER CAVITY COHERENT 

分 类 号：TN2[电子电信—物理电子学]