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Optical magnetometer array for fetal magnetocardiography.
Wyllie, Robert; Kauer, Matthew; Wakai, Ronald T; Walker, Thad G.
Afiliação
  • Wyllie R; Department of Physics, University of Wisconsin­Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA.
Opt Lett ; 37(12): 2247-9, 2012 Jun 15.
Article em En | MEDLINE | ID: mdl-22739870
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.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Magnetocardiografia / Fenômenos Ópticos / Feto Idioma: En Revista: Opt Lett Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Magnetocardiografia / Fenômenos Ópticos / Feto Idioma: En Revista: Opt Lett Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Estados Unidos