Accession Number : ADD015133

Title :   Optical Fiber Magnetometer.

Descriptive Note : Patent,Filed 22 Apr 85, patented 6 Aug 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Scarzello, John F ; Finkel, Jack

Report Date : 06 Aug 1991

Pagination or Media Count : 5

Abstract : An optical fiber magnetometer having omnidirectional capability is disclosed 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 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. (Author)

Descriptors :   BANDS(STRIPS), FARADAY EFFECT, FIBER OPTICS, LENGTH, MAGNETIC FIELDS, MAGNETOMETERS, OMNIDIRECTIONAL, OPTICAL EQUIPMENT, OPTICAL PROPERTIES, ORIENTATION(DIRECTION), PHYSICAL PROPERTIES, POLARIZATION, ROTATION, RUBBER, WINDING, YARNS

Subject Categories : Magnetic & Electric Fld Detection & Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE