Patents by Inventor Carlos Luis De Barros

Carlos Luis De Barros has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Slanted Bragg grating gain flattening filter having spatially overlapping elementary filters and a manufacturing method therefor
    Patent number: 7376306
    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.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: May 20, 2008
    Assignee: Avanex Corporation
    Inventors: Lionel A. Provost, Marianne Molina, Xavier Bonnet, Carlos Luis De Barros