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:
Apr. 17, 1979
Filed:
Jun. 30, 1977
Applicant:
Inventors:
Takeshi Akamatsu, Nishinomiya, JP;
Koji Okamura, Kakogawa, JP;
Assignee:
Fujitsu Limited, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
65 / ; 427163 ;
Abstract
An improved method of producing an optical fiber with a low transmission loss for use in an optical communication system. The method comprises a chemical vapor deposition process wherein starting materials in gas phase are oxidized to form a soot on a glass substrate, and the soot which deposits on the substrate is vitrified in an atmosphere of an inert gas which is easily dissolved in the vitrified glass. A preferable soot contains silicon dioxide, a first dopant for effecting an increase of the refraction index of the silicon dioxide and a second dopant for effecting a reduction of the vitrification temperature of the soot.