Patents by Inventor Seyed-Iraj Najafi

Seyed-Iraj Najafi 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).

  • Patent number: 5080503
    Abstract: The present disclosure describes an optical waveguide device and a method for making such device. The device comprises a substrate; a waveguide embedded in the substrate, the waveguide having a refractive index higher than the refractive index of the substrate; and first and second optical mirrors placed respectively in two different positions along the waveguide. The method comprises steps of (a) cleaning a substrate by means of a cleaning agent; (b) embedding a waveguide in the substrate; and (c) placing first and second optical mirrors respectively at two different positions in the substrate, the steps (b) and (c) being performed in such a manner that the mirrors being positioned along the waveguide.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: January 14, 1992
    Assignee: Ecole Polytechnique
    Inventors: Seyed-Iraj Najafi, Kenneth O. Hill, John F. Currie
  • Patent number: 4963177
    Abstract: The present disclosure makes a grating assisted optical waveguide device.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: October 16, 1990
    Assignee: Canadian Patents and Development Limited/Societe Canadienne des Brevets et d'Exploitation Limitee
    Inventors: Seyed-Iraj Najafi, Kenneth O. Hill, Francois Bilodeau, Derwyn C. Johnson