Influence of pump intensity on atomic spin relaxation in a vapor cell  

作　　者：Chen Yang Guan-Hua Zuo Zhuang-Zhuang Tian Yu-Chi Zhang Tian-Cai Zhang 杨晨;左冠华;田壮壮;张玉驰;张天才(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China;College of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [3]College of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Physics B》2019年第11期339-343,共5页中国物理B（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2017YFA0304502);the National Natural Science Foundation of China(Grant Nos.11634008,11674203,11574187,and 61227902)

摘　　要：Atomic spin relaxation in a vapor cell, which can be characterized by the magnetic resonance linewidth(MRL),is an important parameter that eventually determines the sensitivity of an atomic magnetometer. In this paper, we have extensively studied how the pump intensity affects the spin relaxation. The experiment is performed with a cesium vapor cell, and the influence of the pump intensity on MRL is measured at room temperature at zero-field resonance. A simple model with five atomic levels of a Λ-like configuration is discussed theoretically, which can be used to represent the experimental process approximately, and the experimental results can be explained to some extent. Both the experimental and the theoretical results show a nonlinear broadening of the MRL when the pump intensity is increasing. The work helps to understand the mechanism of pump induced atomic spin relaxation in the atomic magnetometers.Atomic spin relaxation in a vapor cell, which can be characterized by the magnetic resonance linewidth(MRL),is an important parameter that eventually determines the sensitivity of an atomic magnetometer. In this paper, we have extensively studied how the pump intensity affects the spin relaxation. The experiment is performed with a cesium vapor cell, and the influence of the pump intensity on MRL is measured at room temperature at zero-field resonance. A simple model with five atomic levels of a Λ-like configuration is discussed theoretically, which can be used to represent the experimental process approximately, and the experimental results can be explained to some extent. Both the experimental and the theoretical results show a nonlinear broadening of the MRL when the pump intensity is increasing. The work helps to understand the mechanism of pump induced atomic spin relaxation in the atomic magnetometers.

关 键 词：ATOMIC MAGNETOMETER ATOMIC SPIN RELAXATION optical PUMPING 

分 类 号：TN2[电子电信—物理电子学]