By Topic

Magnetic Field Vector Detection in Frequency Domain with an Optically Pumped Atomic Magnetometer

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Mizutani, N. ; Frontier Res. Center, Canon Inc., Tokyo, Japan ; Kobayashi, T.

The motion of spin polarization in a high-sensitivity optically pumped atomic magnetometer is described by the Bloch equation. We propose a magnetometer having two nonparallel probe beams to measure both the x and y components of spin polarization, while a pumping beam propagates in the z direction. When a bias magnetic field is applied parallel to the pumping beam, the magnetic fields Bx and By both affect the x and y components of the spin polarization. The relation between the magnetic field and the magnetometer signal is correctly expressed in matrix form for a simple oscillating magnetic field. The relation enables us to solve the Bloch equation in the frequency domain and retrieve the original waveform of the time-dependent magnetic field waveform. This magnetometer also compensates for distortion of the waveform caused by the resonant nature of the Bloch equation. The magnetic field signal recovery is demonstrated by numerical simulation and the preferred parameter range for the proposed dual-probe magnetometer is shown. As a result, the proposed magnetometer will expand the possibility for weak magnetic field measurements, including biomagnetic fields.

Published in:

Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )