Optical fiber magnetometer

Details Optical fiber magnetometer Optical fiber magnetometer

1985-04-22

1991-08-06

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Magnetometers

250227, 359281, 324 96, 324260, G01R 3302, G01R 33032

Patent

active

050381032

ABSTRACT:
An optical fiber magnetometer having omnidirectional capability is disclo herein for measuring a total magnetic field independent of its physical orientation or the direction of the field or fields. A relatively long optical fiber defining a sensing arm for exposure to a magnetic field is wound in the form of a spheroid (like rubber bands on a golf ball or yarn threads on a baseball) to provide optical path lengths of substantially the same total length in every direction through the spheroid winding. The plane of polarization of light transmitted through the optical fiber winding is caused to rotate (Faraday effect) when the fiber or components thereof is exposed parallel to a magnetic field. The extent of plane rotation is determined, inter alia, by the total magnetic field passing through the spheroid winding.

REFERENCES:
patent: 3324394 (1967-06-01), Cheney
patent: 3693082 (1972-09-01), Saecklin
patent: 3810013 (1974-05-01), Muller
patent: 4376248 (1983-05-01), Giallorenzi et al.
patent: 4433291 (1984-02-01), Yariv et al.

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