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:
Aug. 30, 2011
Filed:
Apr. 22, 2010
Denis Molin, Draveil, FR;
Yves Lumineau, Herblay, FR;
Pierre Sillard, Le Chesnay, FR;
Ralph Petrus Johannes Adrianus Van Lankveld, Den Dungen, NL;
Koen DE Jongh, Son en Breugel, NL;
Denis Molin, Draveil, FR;
Yves Lumineau, Herblay, FR;
Pierre Sillard, Le Chesnay, FR;
Ralph Petrus Johannes Adrianus Van Lankveld, Den Dungen, NL;
Koen de Jongh, Son en Breugel, NL;
Draka Comteq, B.V., Amsterdam, NL;
Abstract
A multimode optical fiber comprises a central core having an alpha profile, a depressed cladding having a portion in continuity with the alpha profile of the central core and a stepped portion, and an outer cladding. The alpha profile is obtained by co-doping at least two dopants. The variation in concentration of each dopant and its derivative in relation to the fiber radius are continuous. A multimode fiber for Ethernet optical system with an improved bandwidth is thus obtained.