Optical Fiber Magnetometer.
Patent,Filed 22 Apr 85, patented 6 Aug 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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
- Magnetic and Electric Field Detection and Detectors