Method for manufacturing an optical fiber preform
AssigneeDraka Comteq B.V.
InventorsCedric Gonnet, Elise Regnier, Frans Gooijer, Pascale Nouchi
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Abstract
A method for manufacturing an optical fiber preform includes the steps of depositing an inner cladding and a central core inside a fluorine doped silica tube and thereafter collapsing the silica tube to form a primary preform. The fluorine doped silica tube has a cross section area that is no more than about 15 percent smaller than the cross section area of the resulting primary preform. The present method facilitates reduced-cost manufacturing of a high-capacity optical fiber preform, which may be drawn to produce an optical fiber having reduced transmission losses.
Claims18
A method of manufacturing a primary preform having a cross section area, the method comprising the steps of:
- depositing an inner cladding and a central core inside a fluorine doped silica tube;
- and
- thereafter collapsing the thus obtained tube to form the primary preform;
- wherein the fluorine doped silica tube has a cross section area no more than about 15 percent smaller than the cross section area of the primary preform obtained from the tube after collapsing.
A method of manufacturing an optical fiber preform comprising the steps of:
- depositing an inner cladding and a central core inside a fluorine doped silica tube, wherein the central core consists essentially of substantially pure silica;
- and
- thereafter collapsing the thus obtained tube to form a primary preform;
- wherein the fluorine doped silica tube has a cross section area no more than about 15 percent smaller than the cross section area of the primary preform obtained from the tube after collapsing.
Dependencies are inferred from the claim text.