Back to Search Start Over

Chip Scale Atomic Magnetometers

Authors :
Peter D. D. Schwindt
John Moreland
Leo W. Hollberg
Svenja Knappe
Vishal Shah
John Kitching
Li-Anne Liew
B. Lindseth
Source :
INTERMAG 2006 - IEEE International Magnetics Conference.
Publication Year :
2006
Publisher :
IEEE, 2006.

Abstract

An optically pumped magnetometer was drastically miniaturized, by taking advantage of MEMS techniques, producing the chip-scale atomic magnetometers (CSAM) physics package. The key component of the package is an alkali vapor cell. To probe the magnetic field experienced by the atoms, the injection current to the VCSEL was modulated at 3.4 GHz near half the hyperfine frequency of 87Rb. Lock-in detection is used to determine the center of the resonance, and the magnetic field is determined by counting the modulation frequency, which is related to the Larmor precession frequency under these locked conditions. The ITO heaters create a large magnetic field gradient, which broadens the resonance and reduces the sensitivity.

Details

Database :
OpenAIRE
Journal :
INTERMAG 2006 - IEEE International Magnetics Conference
Accession number :
edsair.doi...........097047217f00d6b0482e8322d61cfe39
Full Text :
https://doi.org/10.1109/intmag.2006.376110