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:
Feb. 16, 1993
Filed:
Jun. 12, 1992
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Abstract
An optical fiber coil in a fiber optic gyro is formed by a single mode optical fiber and two polarization retaining optical fibers of the same length connected respectively to both ends of the single mode optical fiber. The polarization retaining optical fibers and an optical fiber coupler are connected, and clockwise and counterclockwise light beams are distributed and supplied by the optical fiber coupler to the optical fiber coil, and the two light beams having returned to the optical fiber coupler are thereby caused to interfere with each other. The lengths of the X-axis and Y-axis components of light are displaced apart in phase to such an extent as not to interfere with each other, by the birefringent property induced in the coil of the single optical fiber and the birefringent property of the polarization retaining optical fibers themselves.