Accession Number : ADD011195

Title :   Fiber Optic Rotation-Sensing Gyroscope with (3x2) Coupler.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Burns,W K

Report Date : 01 May 1984

Pagination or Media Count : 8

Abstract : A Sagnac gyroscope, for measuring rotation rates, having an optical coupler, adapted for fabrication by integrated optical techniques, which is compact and provides for operation of the gyroscope at quadrature for small rotation rates. The optical coupler is a symmetrical, channel waveguide structure comprising a two-mode central waveguide branching into three one-mode input waveguides at one end and into two one-mode output waveguides at the other end. The output waveguides are optically coupled to the ends of a fiber-optic loop which provides a closed path in which the Sagnac phase shift is produced. The middle input waveguide is adapted to transmit an incident beam into the optical coupler while the outer input waveguides are adapted to transmit the output beams of the Sagnac gyroscope to a circuit for measuring and comparing the intensities of the beams in the outer waveguides so that the rotation rate may be determined. (Author)

Descriptors :   *Patents, *Gyroscopes, *Waveguide couplers, *Fiber optics, Couplers, Phase shift, Laser beams, Integrated systems, Optical equipment, Detection, Channels, Loops, Input, External, Optics, Paths, Rates, Electric fields, Structures, Measurement, Orthogonality, Intensity, Rotation

Subject Categories : Lasers and Masers
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE