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:
Jul. 12, 2005
Filed:
May. 30, 2002
Pierryle Jourdier, Paris, FR;
Jean-florent Campion, Conflans St Honorine, FR;
Jean-maxime Saugrain, Le Vesinet, FR;
Christelle Lavallade, Hickory, NC (US);
Claire Wane Nguila, Paris, FR;
Pierryle Jourdier, Paris, FR;
Jean-Florent Campion, Conflans St Honorine, FR;
Jean-Maxime Saugrain, Le Vesinet, FR;
Christelle Lavallade, Hickory, NC (US);
Claire Wane Nguila, Paris, FR;
Alcatel, Paris, FR;
Abstract
The invention relates to a method of doping silica with fluorine. The method described comprises mixing a powder of silica granules with a solid fluorine compound, thermally decomposing the solid fluorine compound under an inert atmosphere, and densifying the granules to obtain dense grains of doped silica. It is preferable to use ammonium bifluoride. The invention is applicable to preparing high index silica glass, in particular for fabricating optical fiber preforms.