All-Fiber Magnetometer With Magnetic Feedback Compensation
- 1 November 1986
- journal article
- Published by SPIE-Intl Soc Optical Eng in Optical Engineering
- Vol. 25 (11) , 251261-251261-
- https://doi.org/10.1117/12.7973991
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.Keywords
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