Effects Of Nonlinear Magnetostrictive Properties In A Fiber Optic Magnetometer

K. P. Koo; A. Dandridge; G. H. Sigel Jr.

doi:10.1117/12.945060

12 November 1984 Effects Of Nonlinear Magnetostrictive Properties In A Fiber Optic Magnetometer

K. P. Koo, A. Dandridge, G. H. Sigel Jr.

Proceedings Volume 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84; (1984) https://doi.org/10.1117/12.945060
Event: 2nd International Conference on Optical Fiber Sensors, 1984, Stuttgart, Germany

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.

Citation Download Citation

K. P. Koo, A. Dandridge, and G. H. Sigel Jr. "Effects Of Nonlinear Magnetostrictive Properties In A Fiber Optic Magnetometer", Proc. SPIE 0514, 2nd Intl Conf on Optical Fiber Sensors: OFS'84, (12 November 1984); https://doi.org/10.1117/12.945060

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