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:
Mar. 18, 2003
Filed:
Oct. 01, 1999
Jean-Florent Campion, Bois Colombes, FR;
Jean-Maxime Saugrain, Le Vesinet, FR;
Christelle Lavallade, Courdimanche, FR;
Jean-François Chariot, Marly le Roi, FR;
Rémi Fauche, Acheres, FR;
Jacques Jolly, Saint Ouen L'Aumone, FR;
Pierryle Jourdier, Paris, FR;
Rosine Meilleur, Montigny le Bretonneux, FR;
Alcatel, Paris, FR;
Abstract
A method of manufacturing an optical fiber preform ( ) comprising: forming at least one silica-based outer deposition layer ( ) by depositing silica on a primary preform ( ) constituted by a bar mainly comprising silica and including a silica-based outer peripheral portion ( ), the method being characterized in that the viscosity of the outer deposition layer ( ) is adjusted to be substantially identical to the viscosity of the outer peripheral portion ( ) of the primary preform ( ) by adding to the silica, over a substantial portion of the outer deposition layer ( ), at least one compound selected from the group formed by the following compounds: CaF , MgF , AlF , B O , and Al O .