Accession Number : ADD011219

Title :   Environmentally Independent Fiber Optic Rotation Sensor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Shaw,H J ; Arditty,H J

Report Date : 24 Jul 1984

Pagination or Media Count : 7

Abstract : Document describes an environmentally independent fiber optic rotation sensor having a polarizer or polarization filter interposed between each beam coupler and the beamsplitter of the rotation sensor. The polarizers permit the passing of the polarization of the beams therethrough while rejecting the cross-polarized waves of the beams thereby causing a co-polarized mode of operation to take place. As a result of the co-polarized mode of operation the rotation sensor is unaffected by the surrounding environmental conditions. However, in so doing, the rotation sensor is subject to spurious fringe patterns which take place at the fiber ends. Elimination of these fringe patterns take place at the input side of the rotation sensor rather than at the output side in order to produce satisfactory rotation sensing. (Author)

Descriptors :   *Patents, *Optical detectors, *Fiber optics, *Rotation, Cross polarization, Waves, Polarizing filters, Beam splitting, Couplers

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE