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Optical Engineering

All-Fiber Magnetometer With Magnetic Feedback Compensation
Author(s): Claus J. Nielsen
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Paper Abstract

An optical magnetometer capable of measuring static as well as dynamic magnetic fields is presented. An all-fiber Mach-Zehnder interferometer powered by a laser diode was used to measure the strain of a metallic glass strip. Using a magnetic feedback technique and an ac magnetic bias field, a minimum detectable field of 5 Gauss in a 1 Hz equivalent noise bandwidth was achieved. The magnetometer responds linearly from 0 Hz to a 3 dB bandwidth of 253 Hz and has a dynamic range of more than 100 dB.

Paper Details

Date Published: 1 November 1986
PDF: 6 pages
Opt. Eng. 25(11) 251261 doi: 10.1117/12.7973991
Published in: Optical Engineering Volume 25, Issue 11
Show Author Affiliations
Claus J. Nielsen, Technical University of Denmark (Denmark)


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