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:
Dec. 30, 2008
Filed:
Dec. 02, 2004
Laura J Ball, Fountaine le Port, FR;
Bruno P M Baney, Avon, FR;
Dana C Bookbinder, Corning, NY (US);
Keith L House, Corning, NY (US);
Rostislav R Khrapko, Moscow, RU;
Susan L Schiefelbein, Ithaca, NY (US);
Lisa a Moore, Corning, NY (US);
Laura J Ball, Fountaine le Port, FR;
Bruno P M Baney, Avon, FR;
Dana C Bookbinder, Corning, NY (US);
Keith L House, Corning, NY (US);
Rostislav R Khrapko, Moscow, RU;
Susan L Schiefelbein, Ithaca, NY (US);
Lisa A Moore, Corning, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
A method of forming an alkali metal oxide-doped optical fiber by diffusing an alkali metal into a surface of a glass article is disclosed. The silica glass article may be in the form of a tube or a rod, or a collection of tubes or rods. The silica glass article containing the alkali metal, and impurities that may have been unintentionally diffused into the glass article, is etched to a depth sufficient to remove the impurities. The silica glass article may be further processed to form a complete optical fiber preform. The preform, when drawn into an optical fiber, exhibits a low attenuation.