Fiber optical magnetic field sensor using magnetostrictive mater

Details Fiber optical magnetic field sensor using magnetostrictive mater Fiber optical magnetic field sensor using magnetostrictive mater

1981-03-06

1983-03-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324 96, G02B 514

Patent

active

043762484

ABSTRACT:
A sensing element of magnetostrictive material associated with an optical fiber of an interferometer arm defining apparatus for detecting magnetic fields. The magnetostrictive material is adhered in close co-extensive adjacency with the optical fiber and in the presence of a magnetic field undergoes responsive longitudinal dimension changes which strains the optical fiber and induces a strain related phase shift in an optically propagating beam in the fiber detectable by interferometry.

REFERENCES:
patent: 3645603 (1972-02-01), Smith
patent: 3701131 (1972-10-01), Brauser et al.
patent: 4147979 (1979-04-01), Baves et al.
patent: 4348587 (1982-09-01), Tangonan et al.
"Magnetic Field Sensing with a Single-Mode Fiber" by Raleigh, Optics Lett, vol. 6, No. 1, Jan. 1981, pp. 19-21.

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