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:
Feb. 16, 2016
Filed:
Feb. 24, 2014
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Makoto Yoshida, Kamisu, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
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.