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Proceedings Paper

Closed-Loop Fiber-Optic Magnetometer/Gradiometer
Author(s): C. M. Dube; S. Thordarson; K. H. Wanser
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Paper Abstract

A closed-loop, fiber-optic magnetometer/gradiometer, utilizing digital signal proces-sing, has been designed, built and tested. Several novel features of this gradiometer are discussed. In particular, the device is simultaneously a magnetometer and gradiometer. The sensor employs metallic glass transducers in a fiber-optic Mach-Zehnder interferometer. A unique signal processing method utilizing magnetic feedback nulling allows for a stable gradiometer and minimal sensor hysteresis. Directional response of the magnetometer and gradiometer, as well as stability of the combined configuration are presented. Currently, the sensor is being characterized in the laboratory. Preliminary results indicate sub-gamma field sensitivity, and results from a packaged sensor are presented.

Paper Details

Date Published: 23 March 1988
PDF: 11 pages
Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988); doi: 10.1117/12.942485
Show Author Affiliations
C. M. Dube, Dynamics Technology, Inc. (United States)
S. Thordarson, Dynamics Technology, Inc. (United States)
K. H. Wanser, Dynamics Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 0838:
Fiber Optic and Laser Sensors V
Ramon P. DePaula; Eric Udd, Editor(s)

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