US 2009/0211301 A1 · METHOD OF FABRICATING AN OPTICAL FIBER PREFORM AND A BURNER THEREFOR

Abstract

A method of fabricating an optical fiber preform, capable of depositing glass particles with high deposition rate without reducing deposition efficiency and fabricating an optical fiber preform having little bubbles using a burner having a simple structure, is provided. In the invention, a mixed gas of a glass raw material gas with a combustion assisting gas is ejected from an annular nozzle of a burner having a coaxially multiple tube structure, and a burnable gas is ejected from an inner nozzle located inside the annular nozzle. Alternatively, a mixed gas of a glass raw material gas with a burnable gas may be ejected from an annular nozzle, and a combustion assisting gas is ejected from an inner nozzle located inside the annular nozzle. In each case of the above, the burnable gas and the combustion assisting gas, respectively, are ejected from outer nozzles located outside the annular nozzle.

Claims6

Dependent claims

A method of fabricating an optical fiber perform comprising the steps of:

ejecting a glass raw material gas, a burnable gas, a combustion assisting gas and a sealing gas from a plurality of nozzles of a burner, respectively, so as to hydrolyze the glass raw material gas in flame and to generate glass particles, the burner having a plurality of tubes with different diameters from each other and being coaxially arranged, the plurality of nozzles being defined by the plurality of tubes;
and
moving the burner relative to a starting rod so as to deposit the glass particles thereon,
wherein in the ejecting step a mixed gas of the glass raw material gas mixed with the combustion assisting gas is ejected from a given annular nozzle among the plurality of nozzles, the burnable gas is ejected from an inner nozzle located inside the annular nozzle, and the burnable gas and the combustion assisting gas are ejected from outer nozzles located outside the annular nozzle, respectively.

1 more element

Dependencies are inferred from the claim text.

Method of fabricating an optical fiber preform and a burner therefor

Life of this patent

Method of fabricating an optical fiber preform and a burner therefor

Life of this patent

Abstract

Claims6