Microfabricated Optically-Pumped Magnetometers for Biomagnetic Applications

8th Symposium on Frequency Standards and Metrology 2015

Knappe, Svenja^1 ; Alem, Orang^1 ; Sheng, Dong^1 ; Kitching, John^1

NIST, 325 Broadway, Boulder

CO

80305, United States^1

关键词: Biomedical measurements;    Heart activities;    Imaging applications;    Magnetic field noise;    Magnetometer arrays;    Microfabricated;    Optically pumped;    Orders of magnitude;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012055/pdf
DOI  :  10.1088/1742-6596/723/1/012055

来源: IOP

【 摘 要 】

We report on the progress in developing microfabricated optically-pumped magnetometer arrays for imaging applications. We have improved our sensitivities by several orders of magnitude in the last ten years. Now, our zero-field magnetometers reach noise values below 15 fT/Hz1/2. Recently, we have also developed gradiometers to reject ambient magnetic field noise. We have built several imaging arrays and validated them for biomedical measurements of brain and heart activity.