Accurate optically pumped magnetometer based on Ramsey-style interrogation

Light-atom interactions during spin preparation and readout in optically pumped magnetometers can lead to inaccuracies. We demonstrate a novel, to the best of our knowledge, detection strategy that exploits an interrogation sequence in the pulsed free-induction-decay modality to suppress these syste...

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Bibliographic Details
Published in:Optics letters 2022-03, Vol.47 (5), p.1230-1233
Main Authors: Hunter, Dominic, Dyer, Terry E, Riis, Erling
Format: Article
Language:English
Subjects:
Interrogation
Magnetic measurement
Magnetometry - methods
Questioning
Systematic errors
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Summary:Light-atom interactions during spin preparation and readout in optically pumped magnetometers can lead to inaccuracies. We demonstrate a novel, to the best of our knowledge, detection strategy that exploits an interrogation sequence in the pulsed free-induction-decay modality to suppress these systematic errors. The technique is predicated on monitoring the dynamics of preoriented atomic spins as they evolve unperturbed during a dark interval, by subsequently applying a time-delayed optical pulse to infer the spin state's phase. This detection mode reduced light shift inaccuracies to within 0.6 nT, and could be employed in a wide variety of high-precision atomic magnetometry experiments.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.449180