梯度计
对偶(语法数字)
物理
梁(结构)
光学
量子力学
艺术
文学类
磁强计
磁场
作者
Zinan Wu,Jialong Zhang,Wei Chen,Zhonghua Ou,Huimin Yue,Chunyue Cheng,Yong Liu
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2024-04-18
卷期号:49 (10): 2781-2781
被引量:1
摘要
We report a single-beam synthetic gradiometer operated in the spin-exchange-relaxation free (SERF) regime, using the structure of two separate atomic vapor cells spaced 2 cm apart. To improve the capability of the gradiometer in suppressing the common-mode magnetic field noise, we are aiming at investigating the effects of the system parameters on the gradiometer common-mode rejection ratio (CMRR). The mathematical expression for the relationship between the gradiometer CMRR and the two variables including the linewidth ratio and the pumping factor ratio is constructed for the first time, to our knowledge. This means that the CMRR can be optimized by controlling the linewidth and the pumping factor, which is easy to implement in the operation process. As a result, a CMRR of 246 is achieved and a gradiometer sensitivity of 4.5 fT/cm/Hz 1/2 is also measured. This method provides a theoretical and experimental basis for the automated operation of gradiometers, and the gradiometer system performance can be tuned to a desired state by simply controlling the linewidth and the incident light intensity.
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