Publications

Pulsed Magnetic Gradiometry in Earth's Field [Poster]

Campbell, Kaleb L.; Wang, Ying-Ju W.; Schwindt, Peter S.; Jau, Yuan-Yu J.; Shah, Vishal S.

We describe a novel pulsed magnetic gradiometer based on the optical interference of sidebands generated using two spatially separated alkali vapor cells. In contrast to traditional magnetic gradiometers, our approach provides a direct readout of the gradient field without the intermediate step of subtracting the outputs of two spatially separated magnetometers. Operation of the gradiometer in multiple field orientations is discussed. The noise floor is measured as low as 25$\frac{fT}{\sqrt{Hz-cm}}$ in a room without magnetic shielding.