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:
May. 20, 2008
Filed:
Aug. 26, 2004
Lionel A. Provost, Marcoussis, FR;
Marianne Molina, Paris, FR;
Xavier Bonnet, Saint Rémy lès Chevreuse, FR;
Carlos Luis DE Barros, Boulogne Billancourt, FR;
Lionel A. Provost, Marcoussis, FR;
Marianne Molina, Paris, FR;
Xavier Bonnet, Saint Rémy lès Chevreuse, FR;
Carlos Luis De Barros, Boulogne Billancourt, FR;
Avanex Corporation, Fremont, CA (US);
Abstract
An optical filter comprises a waveguide and a plurality of Slanted Bragg Gratings written in the waveguide, wherein at least two of the Slanted Bragg Gratings overlap one another. A method of producing an optical filter comprises the steps of passing an ultraviolet light through a first portion of a chirped phase mask onto a first portion of a photosensitive waveguide so as to form a first Slanted Bragg Grating in the first portion of the waveguide and passing the ultraviolet light through a second portion of the chirped phase mask onto a second portion of the photosensitive waveguide so as to form a second Slanted Bragg Grating in the second portion of the waveguide, wherein the first and second Slanted Bragg Gratings overlap one another. A further annealing step may cause a spectrum of the filter to match a target spectrum.