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:
Nov. 23, 1999
Filed:
Sep. 03, 1997
NGK Insulators, Ltd., , JP;
Abstract
An optical waveguide substrate having a substrate made of ferroelectric optical single crystal and a ridge portion projected from a main plane of the substrate, has a construction such that the ridge portion has a base portion made of ferroelectric optical single crystal and an optical waveguide formed on the base portion. The optical waveguide substrate is formed by forming at least one optical waveguide layer on a main plane of a substrate made of ferroelectric optical single crystal, and mechanically working main planes of the optical waveguide layer and the substrate to form a ridge portion projected from the main plane of the substrate. The optical waveguide substrate can reduce a light transmission loss, increase an extinction ratio, and improve an electric field applying efficiency.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile