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Proceedings Paper

Effects Of Nonlinear Magnetostrictive Properties In A Fiber Optic Magnetometer
Author(s): K. P. Koo; A. Dandridge; G. H. Sigel Jr.
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Paper Abstract

Fiber optic magnetometers have been reported recently.1-3 These devices make use of magnetostrictive materials such as metallic glass or nickel to stretch one fiber arm in a Mach-Zehnder fiber interferometer. When the magnetostrictive material is exposed to a magnetic field, an optical signal proportional to the interferometer phase shift is induced. By calibrating the optical signals to the magnetic fields, the device can then be used as a magnetometer. The characteristics of the magnetometer will depend on the magnetostrictive properties of the magnetic material used. In this paper, the operating conditions relating to sensor sensitivity, linearity and dynamic range of such a fiber magnetometer are presented based on the AC and DC magneto-strictive responses of the sensor material (a metallic glass ribbon). A comparison of experimental results to existing theoretical models is also addressed.

Paper Details

Date Published: 12 November 1984
PDF: 12 pages
Proc. SPIE 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84, (12 November 1984); doi: 10.1117/12.945060
Show Author Affiliations
K. P. Koo, Naval Research Laboratory (United States)
A. Dandridge, Naval Research Laboratory (United States)
G. H. Sigel Jr., Naval Research Laboratory (United States)

Published in SPIE Proceedings Vol. 0514:
2nd Intl Conf on Optical Fiber Sensors: OFS'84
Ralf Th. Kersten; Rainer Kist, Editor(s)

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