Patents Assigned to Her Majesy in Right of Canada as Represented by the Minister of Communications
  • 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