A sensitive and accurate atomic magnetometer based on free spin precession
- Grujić, Zoran D. Physics Department, University of Fribourg, Switzerland
- Koss, Peter A. Physics Department, University of Fribourg, Switzerland
- Bison, Georg Paul Scherrer Institute, Villigen, Switzerland
- Weis, Antoine Physics Department, University of Fribourg, Switzerland
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21.05.2015
Published in:
- The European Physical Journal D. - 2015, vol. 69, no. 5, p. 1–10
English
We present a laser-based atomic magnetometer that allows inferring the modulus of a magnetic field from the free Larmor precession of spin-oriented Cs vapour atoms. The detection of free spin precession (FSP) is not subject to systematic readout errors that occur in phase feedback-controlled magnetometers in which the spin precession is actively driven by an oscillating field or a modulation of light parameters, such as frequency, amplitude, or polarization. We demonstrate that an FSP-magnetometer can achieve a ∼200 fT/√Hz sensitivity (<100 fT/√Hz in the shotnoise limit) and an absolute accuracy at the same level.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 255953
- DOI 10.1140/epjd/e2015-50875-3
- Persistent URL
- https://folia.unifr.ch/unifr/documents/304330
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