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Sensors 2017, 17(3), 561; doi:10.3390/s17030561

An Optically Pumped Magnetometer Working in the Light-Shift Dispersed Mz Mode

1
Leibniz Institute of Photonic Technology, Albert-Einstein-Straße 9, D-07745 Jena, Germany
2
Supracon AG, An der Lehmgrube 11, D-07751 Jena, Germany
3
Present Address: Physics Department, University of Fribourg, Chemin du Mus
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 18 January 2017 / Revised: 3 March 2017 / Accepted: 3 March 2017 / Published: 10 March 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [9578 KB, uploaded 10 March 2017]   |  

Abstract

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. View Full-Text
Keywords: magnetometer; optically pumped magnetometer; light shift; Mz; magnetic-field resolution; Latin Hypercube Sampling; Downhill simplex magnetometer; optically pumped magnetometer; light shift; Mz; magnetic-field resolution; Latin Hypercube Sampling; Downhill simplex
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Schultze, V.; Schillig, B.; IJsselsteijn, R.; Scholtes, T.; Woetzel, S.; Stolz, R. An Optically Pumped Magnetometer Working in the Light-Shift Dispersed Mz Mode. Sensors 2017, 17, 561.

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