Accession Number : ADD011152

Title :   Optical Fiber Gyroscope with (3x3) Directional Coupler.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sheem,S K

Report Date : 03 Apr 1984

Pagination or Media Count : 6

Abstract : Document describes a sagnac rotation sensing interferometer disposed on a rotating platform for use as a gyroscope comprising a closed optical light path and a beam splitter for splitting an input light beam into two beams directed to transverse the closed optical path in opposite directions wherein the beam splitter is composed of a directional coupler with three input ports and three output ports. The first of the three input ports receives optical input and the second and third of the input ports are disposed symmetrically with respect to the first input port. Optical output from two output ports corresponding to the second and third input ports are directed to both ends of the closed optical fiber light path. A gyroscope according to this arrangement provides light output from the beam splitter which operates automatically near quadrature without a nonreciprocal pi/2 phase bias applied in the fiber loop as required in conventional optical fiber gyroscopes. (Author)

Descriptors :   *Patents, *Gyroscopes, *Couplers, *Fiber optics, Beam splitting, Light, Input, Output, Ports(Openings), Paths, Optical properties, Transverse

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE