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Optical magnetometer array for fetal magnetocardiography |
Optics Letters, Vol. 37, Issue 12, pp. 2247-2249 (2012)
http://dx.doi.org/10.1364/OL.37.002247
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Abstract
We describe an array of spin-exchange-relaxation-free optical magnetometers designed for detection of fetal magnetocardiography (fMCG). The individual magnetometers are configured with a small volume with intense optical pumping, surrounded by a large pump-free region. Spin-polarized atoms that diffuse out of the optical pumping region precess in the ambient magnetic field and are detected by a probe laser. Four such magnetometers, at the corners of a 7 cm square, are configured for gradiometry by feeding back the output of one magnetometer to a field coil to null uniform magnetic field noise at frequencies up to 200 Hz. We present the first measurements of fMCG signals using an atomic magnetometer.
© 2012 Optical Society of America
OCIS Codes
(170.4580) Medical optics and biotechnology : Optical diagnostics for medicine
(280.1415) Remote sensing and sensors : Biological sensing and sensors
ToC Category:
Medical Optics and Biotechnology
History
Original Manuscript: February 22, 2012
Revised Manuscript: March 27, 2012
Manuscript Accepted: March 28, 2012
Published: June 6, 2012
Virtual Issues
Vol. 7, Iss. 8 Virtual Journal for Biomedical Optics
Citation
Robert Wyllie, Matthew Kauer, Ronald T. Wakai, and Thad G. Walker, "Optical magnetometer array for fetal magnetocardiography," Opt. Lett. 37, 2247-2249 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-12-2247
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