论文标题
在22 $μ$ t地球级磁场中，具有低于20英尺/cm/$ \ sqrt {\ rm hz} $敏感性的全光学原子渐变级
An all-optical intrinsic atomic gradiometer with sub-20 fT/cm/$\sqrt{\rm Hz}$ sensitivity in a 22 $μ$T earth-scale magnetic field
论文作者
论文摘要
在这项工作中，我们证明了能够在地球层环境中运行的高灵敏度原子梯度计。我们在Larmor频率的四倍上应用一个灯 - 脉冲序列，以达到梯度敏感性<20 ft/cm/$ \ sqrt {\ rm hz} $，在22 $ $ t的有限场强度下。实验定时序列可以调整为感兴趣的场幅度。我们的一维全光梯度仪在4 cm基线的两个蒸气电池的两个区域之间进行了差异测量。我们的结果为在更高维度，矢量灵敏度和更高级的渐变计中运行的扩展铺平了道路。
In this work we demonstrate a high sensitivity atomic gradiometer capable of operation in earth-field level environments. We apply a light-pulse sequence at four times the Larmor frequency to achieve gradiometer sensitivity <20 fT/cm/$\sqrt{\rm Hz}$ at the finite field strength of 22 $μ$T. The experimental timing sequence can be tuned to the field magnitude of interest. Our one dimensional all-optical gradiometer performs a differential measurement between two regions of a single vapor cell on a 4 cm baseline. Our results pave the way for extensions to operation in higher dimensions, vector sensitivity, and more advanced gradiometers.
