The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 1984
Filed:
Mar. 09, 1982
Sang K Sheem, Richardson, TX (US);
Other;
Abstract
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 otical 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 (3.times.3) coupler with two first output waveguides symmetrically disposed about an input waveguide for splitting the input beam into equal components and a (2.times.2) coupler with two second output waveguides adjacently disposed for providing interference between the output beams. The second output waveguides of the (2.times.2) coupler couple the first otput waveguides of the (3.times.3) coupler to the end of the fiber-optic loop.