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. 25, 1992
Filed:
Aug. 02, 1990
Applicant:
Inventors:
Christian Le Sergent, Marconisions, FR;
Josiane Ramos, Bondoulfe, FR;
Assignee:
Compagnie Generale d'Electricite, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
65-312 ; 15DI / ; 15 183 ; 385127 ;
Abstract
According to the present invention, a preform (7) for an optical fiber is made from a tube having a substrate layer (16) of fluorine-doped silica and a support layer (18) of non-doped silica. A cladding layer (8) of fluorine-doped silica and a core layer (10) of non-doped silica are formed on the inside surface of the tube by chemical vapor phase deposition. The optical fiber is subsequently obtained by collapsing the tube and drawing it. The invention is applicable to fabricating optical fibers.