Patents by Inventor Francois C. Bilodeau

Francois C. Bilodeau 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).

  • Photosensitization of optical fiber and silica waveguides
    Patent number: 5495548
    Abstract: A method of fabricating a strongly photosensitive optical waveguide is comprised of locally heating at least a portion of a weakly photosensitive optical waveguide for a period of time sufficient to increase the density of defects associated with photosensitivity in the heated portion of the waveguide core.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: February 27, 1996
    Assignee: Her Majesty the Queen in Right of Canada, as represented by the Minister of Communications
    Inventors: Francois C. Bilodeau, Bernard Y. Malo, Jacques Albert, Derwyn C. Johnson, Kenneth O. Hill
  • Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same
    Patent number: 5367588
    Abstract: An index grating is imprinted in the core of an optical fiber using a specially designed silica glass phase grating mask. The phase mask is held in close proximity to the optical fiber. Laser irradiation of the phase mask with ultraviolet light at normal incidence imprints (photoinduces) into the optical fiber core the interference pattern created by the phase mask.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: November 22, 1994
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of Communications
    Inventors: Kenneth O. Hill, Bernard Y. Malo, Francois C. Bilodeau, Derwyn C. Johnson
  • Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same
    Patent number: RE39865
    Abstract: An index grating is imprinted in the core of an optical fiber using a specially designed silica glass phase grating mask. The phase mask is held in close proximity to the optical fiber. Laser irradiation of the phase mask with ultraviolet light at normal incidence imprints (photoinduces) into the optical fiber core the interference pattern created by the phase mask.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: October 2, 2007
    Assignee: Her Majesy in Right of Canada as Represented by the Minister of Communications
    Inventors: Kenneth O. Hill, Bernard Y. Malo, Francois C. Bilodeau, Derwyn C. Johnson