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. 25, 2006
Filed:
Sep. 29, 2003
Lionel Provost, Marcoussis, FR;
Christian Simonneau, Antony, FR;
Isabelle Bongrand, Cannes, FR;
Philippe Bousselet, Leudeville, FR;
Christine Moreau, Palaiseau, FR;
Dominique Bayart, Clamart, FR;
Laurent Gasca, Villebon sur Yvette, FR;
Lionel Provost, Marcoussis, FR;
Christian Simonneau, Antony, FR;
Isabelle Bongrand, Cannes, FR;
Philippe Bousselet, Leudeville, FR;
Christine Moreau, Palaiseau, FR;
Dominique Bayart, Clamart, FR;
Laurent Gasca, Villebon sur Yvette, FR;
ALCATEL, Paris, FR;
Abstract
An optical fiber amplifier is considered comprising a mono-mode core, a first cladding around said core and at least a further cladding around said first cladding while said first cladding includes a ring shaped active region doped with rare earth material surrounding said mono-mode core. Advantageously, the first cladding is designed with a radial refractive index following an almost continuous decreasing function for increasing radius. The use of a continuously decreasing refractive index for the cladding at the outer border of the ring shaped active medium optimize the efficiency of the coupling between the core and the cladding.