Accession Number : ADD016373

Title :   Magnetostrictive Transducer System Having a Three Dual-Strip Fiber Optic Magnetostrictive Transducers Bonded into a Single Fiber Mach-Zehnder Interferometer.

Descriptive Note : Patent, Filed 29 Jan 93, patented 19 Apr 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bucholtz, Frank ; Koo, Kee P ; Dagenais, Dominique M

Report Date : 19 Apr 1994

Pagination or Media Count : 10

Abstract : The fiber-optic magnetostrictive transducer system consists of a sensing element having three dual-strip fiber optic magnetostrictive transducers bonded into a single fiber Mach-Zehnder interferometer operating single mode mounted in a symmetrical orthogonal geometry. The dual-strip fiber optic magnetostrictive transducers have predictable and consistent reproducibility and are comprised of a pair of field annealed metallic glass strips bonded to a coil of optical fiber. This structure is in turn mounted on a bobbin structure where the fiber ribbon is attached to the bobbin only at the two ends of the bobbin. This reduces the possible loading of the transducer due to friction between the optical fiber and the surface of the mounting structure and at the same time provide a long sensing fiber in contact with the magnetostrictive element for high sensitivity. The symmetrical orthogonal arrangement of the transducers minimizes magnetic crosstalk and the strip form of the transducer elements maintain. High directional sensitivity.

Descriptors :   *FIBER OPTICS, *PATENTS, *MAGNETIC DETECTORS, *MAGNETOSTRICTIVE ELEMENTS, *TRANSDUCERS, COILS, CROSSTALK, INTERFEROMETERS, FRICTION, GLASS, HIGH SENSITIVITY, INTERFEROMETERS, REPRODUCIBILITY, SENSITIVITY, MAGNETIC FIELDS, MAGNETOMETERS

Subject Categories : Magnetic & Electric Fld Detection & Detectors
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE