Patents by Inventor B. Lamontagne

B. Lamontagne 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).

  • Optical grating-based device having a slab waveguide polarization compensating region
    Patent number: 5937113
    Abstract: A device for compensating the birefringence normally associated with an integrated optical waveguide grating device has a polarization compensating slab waveguide region. This compensating region can be provided within the slab waveguide region normally present in the grating device by etching, doping, ion implanting a sub-region of a predetermined shape and dimension to change its birefringence. Alternatively, or in combination with changing the birefringence in this sub-region, electrodes can be provided for electro-optically changing the birefringence dynamically as required. This device can be applied to reflective and transmissive diffraction gratings and to phased array waveguide gratings.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: August 10, 1999
    Assignee: National Research Council of Canada
    Inventors: Jian-Jun He, Emil S. Koteles, L. Erickson, B. Lamontagne, A. Delage