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:
Jun. 07, 2005
Filed:
May. 02, 2002
Ludovic Fleury, Bois d'Arcy, FR;
Louis-anne DE Montmorillon, Paris, FR;
Florent Beaumont, Conflans Ste Honorine, FR;
Pierre Sillard, Le Chesnay, FR;
Maxime Gorlier, Paris, FR;
Pascale Nouchi, Maisons-Lafitte, FR;
Jean-florent Campion, Conflans St Honorine, FR;
Christine Labatut, Conflans Ste Honorine, FR;
Ludovic Fleury, Bois d'Arcy, FR;
Louis-Anne de Montmorillon, Paris, FR;
Florent Beaumont, Conflans Ste Honorine, FR;
Pierre Sillard, Le Chesnay, FR;
Maxime Gorlier, Paris, FR;
Pascale Nouchi, Maisons-Lafitte, FR;
Jean-Florent Campion, Conflans St Honorine, FR;
Christine Labatut, Conflans Ste Honorine, FR;
Alcatel, Paris, FR;
Abstract
The invention provides a step index optical fiber which presents cladding having an index lower than the index of silica and a core with an index higher than the index of silica. The fiber is obtained by drawing a preform made by chemical vapor deposition using a deposition tube of index lower than the index of silica. Inner cladding of index substantially equal to the index of the deposition tube, and then a core of index higher than the index of the inner cladding are deposited in succession therein. The invention makes it possible to obtain a fiber having a large effective area, reduced attenuation, and suitable for being fabricated at low cost by chemical vapor deposition.