NDLI: Control loops for a Coupled Dark State Magnetometer

Content Provider	IEEE Xplore Digital Library
Author	Pollinger, A. Lammegger, R. Magnes, W. Ellmeier, M. Baumjohann, W. Windholz, L.
Copyright Year	2010
Description	Author affiliation: Institute of Experimental Physics, Graz University of Technology, Austria (Lammegger, R.; Ellmeier, M.; Windholz, L.) \|\| Space Research Institute, Austrian Academy of Sciences, Graz, Austria (Pollinger, A.; Magnes, W.; Baumjohann, W.)
Abstract	The Coupled Dark State Magnetometer (CDSM) is a new type of scalar magnetometer, which is based on two-photon spectroscopy of free alkali atoms. CDSM measurements do not depend on the sensor temperature. Furthermore, it has no dead zones, no moving parts and no excitation coils at the sensor. This paper deals with the control loops which are developed for tracking the magnetic field dependent resonances and for avoiding drifts of the carrier frequency of the laser diode used as excitation light source. It is the first time that a magnetometer of this type is operated in a control loop. The implementation of several functional blocks in a Field Programmable Gate Array (FPGA) is a first step towards miniaturization for a future space application. The magnetic field magnitude is measured by a frequency. Therefore, the Direct Digital Synthesis (DDS) principle is used for accurate signal generation. A noise floor measurement has shown no 1/f dependence near DC and 70pT/√Hz up to the corner frequency of 3Hz for which the CDSM is designed.
Starting Page	779
Ending Page	784
File Size	776211
Page Count	6
File Format	PDF
ISBN	9781424481705
ISSN	19300395
e-ISBN	9781424481699
e-ISBN	9781424481682
DOI	10.1109/ICSENS.2010.5690766
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetometers Magnetic resonance Frequency modulation Magnetic domains Vertical cavity surface emitting lasers Frequency measurement Field programmable gate arrays
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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