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. 04, 2006
Filed:
Mar. 01, 2001
Isabelle Riant, Orsay, FR;
Carlos DE Barros, Boulogne-Billancourt, FR;
Michel Jurczyszyn, Ivry sur Seine, FR;
Pierre Sansonetti, Palaiseau, FR;
Isabelle Riant, Orsay, FR;
Carlos De Barros, Boulogne-Billancourt, FR;
Michel Jurczyszyn, Ivry sur Seine, FR;
Pierre Sansonetti, Palaiseau, FR;
Avanex Corporation, Fremont, CA (US);
Abstract
The invention relates to an optical fiber presenting a core, cladding, and a grating written by irradiation and coupling at least one light mode into the cladding so that it is dissipated therein. The invention proposes causing the mean index to vary progressively along the grating, at least at the ends of the grating. The progressive variation in mean index or in the amplitude of index modulation for writing the grating serves to limit insertion losses to the filter formed by the grating. Analogously, in a written-in grating, the invention provides the equivalent of progressively varying the core size of the fiber for interconnecting two optical fibers presenting different core diameters. The invention is applicable in particular to gain-equalizing filters in WDM transmission systems.