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:
Jun. 05, 2007
Filed:
Mar. 24, 2005
Chie Fukuda, Yokohama, JP;
Tetsuya Hattori, Yokohama, JP;
Morihiro Seki, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A method of manufacturing an optical waveguide device that is capable of reducing the imbalance in the refractive index profile of a core, and an optical waveguide device that has the reduced imbalance in the refractive index profile are provided. The method of manufacturing an optical waveguide device has the steps of forming a groove in a first cladding layer having a first dopant that lowers the refractive index of the first cladding layer below the refractive index of pure silica glass, forming a core in the groove, and forming a second cladding layer having a second dopant that lowers the refractive index of the second cladding layer below the refractive index of pure silica glass, over the first cladding layer and the core.