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An optically pumped magnetometer working in the light-shift dispersed Mz mode

  • Schultze, Volkmar Leibniz Institute of Photonic Technology, Jena, Germany
  • Schillig, Bastian Leibniz Institute of Photonic Technology, Jena, Germany
  • IJsselsteijn, Rob Supracon AG, Jena, Germany
  • Scholtes, Theo Leibniz Institute of Photonic Technology, Jena, Germany - Physics Department, University of Fribourg, Switzerland
  • Woetzel, Stefan Leibniz Institute of Photonic Technology, Jena, Germany
  • Stolz, Ronny Leibniz Institute of Photonic Technology, Jena, Germany
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    10.03.2017
Published in:
  • Sensors. - 2017, vol. 17, no. 3, p. 561
magnetometer
optically pumped magnetometer
light shift
Mz
magnetic-field resolution
Latin Hypercube Sampling
Downhill simplex
English We present an optically pumped magnetometer working in a new operational mode— the light-shift dispersed Mz (LSD-Mz) mode. It is realized combining various features; (1) high power off-resonant optical pumping; (2) Mz configuration, where pumping light and magnetic field of interest are oriented parallel to each other; (3) use of small alkali metal vapor cells of identical properties in integrated array structures, where two such cells are pumped by circularly polarized light of opposite helicity; and (4) subtraction of the Mz signals of these two cells. The LSD-Mz magnetometer’s performance depends on the inherent and very complex interplay of input parameters. In order to find the configuration of optimal magnetometer resolution, a sensitivity analysis of the input parameters by means of Latin Hypercube Sampling was carried out. The resulting datasets of the multi-dimensional parameter space exploration were assessed by a subsequent physically reasonable interpretation. Finally, the best shot-noise limited magnetic field resolution was determined within that parameter space. As the result, using two 50 mm3 integrated vapor cells a magnetic field resolution below 10 fT/√Hz at Earth’s magnetic field strength is possible.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/305581
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