Accession Number : ADD009366

Title :   Optical Rotation-Sensing Interferometer with (3X3)-(2X2) Directional Coupler.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sheem,Sang K

Report Date : 09 Mar 1982

Pagination or Media Count : 15

Abstract : This document describes a Sagnac rotation-sensing interferometer with a fiber-optic loop for providing a closed optical path in which counter-propagating light beams are phase shifted due to the Sagnac effect and with an optical coupler for splitting an input beam into the counter-propagating light beams in the fiber-optic loop and for providing for interference between the output beams of the fiber-optic loop. The optical coupler includes a (3X3) coupler with two first output waveguides symmetrically disposed about an input waveguide for splitting the input beam into equal components and a (2X2) coupler with two second output waveguides adjacently disposed for providing interference between the output beams. The second output waveguides of the (2X2) coupler couple the first output waveguides of the (3X3) coupler to the end of the fiber-optic loop. (Author)

Descriptors :   *Patent applications, *Optical interferometers, *Gyroscopes, Polarization, Phase shift, Optical waveguides, Waveguide couplers, Angular motion, Sensitivity, Fiber optics

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE