Method for manufacturing an optical fiber preform
AssigneeDraka Comteq B.V.
InventorsCedric Gonnet, Elise Regnier, Frans Gooijer, Pascale Nouchi
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a final optical fiber preform via overcladding of a primary preform having a cross section area is disclosed. The method includes at least one manufacturing step of the primary preform by deposit of an inner cladding and of a central core inside a tube of fluorine-doped silica, the tube being chosen such that it has a cross section area that is maximally about 15% less than the cross section area of the primary preform. With the method of the invention it is possible to manufacture a preform of large capacity at reduced cost which allows the drawing of an optical fiber having reduced transmission losses.
Claims21
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,
- thereafter collapsing the thus obtained tube to form a primary preform,
- wherein said fluorine doped silica tube has a cross section area no more than about 15% smaller than the cross section area of the primary preform obtained from said tube after collapsing, and
- overcladding the primary preform using natural silica particles to obtain an overclad on an outer surface of the primary preform.
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,
- thereafter collapsing the thus obtained tube to form a primary preform,
- wherein said fluorine doped silica tube has a cross section area no more than about 15% smaller than the cross section area of the primary preform obtained from said tube after collapsing, and
- overcladding the primary preform using natural silica particles to obtain an overclad on an outer surface of the primary preform.
Dependencies are inferred from the claim text.