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:
Aug. 05, 2014
Filed:
Aug. 27, 2004
Dana C. Bookbinder, Corning, NY (US);
Lisa C. Chacon, Corning, NY (US);
Adam J. G. Ellison, Painted Post, NY (US);
Rostislav R. Khrapko, Corning, NY (US);
Stephan L. Logunov, Corning, NY (US);
Michael T. Murtagh, Painted Post, NY (US);
Sabyasachi Sen, Painted Post, NY (US);
Dana C. Bookbinder, Corning, NY (US);
Lisa C. Chacon, Corning, NY (US);
Adam J. G. Ellison, Painted Post, NY (US);
Rostislav R. Khrapko, Corning, NY (US);
Stephan L. Logunov, Corning, NY (US);
Michael T. Murtagh, Painted Post, NY (US);
Sabyasachi Sen, Painted Post, NY (US);
Corning Incorporated, Corning, NY (US);
Abstract
Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.