Patents by Inventor John J. Veselka

John J. Veselka 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).

  • Electrooptic device structure and method for reducing thermal effects in optical waveguide modulators
    Patent number: 5388170
    Abstract: An interferometric modulator comprising a substrate of titanium-doped lithium niobate (Ti:LiNbO.sub.3) having top and bottom surfaces and a waveguide formed in the top surface is disclosed. A conductive layer is formed on the bottom surface of the substrate and electrically coupled to a top-surface ground plane or simply to ground potential. The bottom surface conductive layer functions to thermally stabilize the modulator during operation.
    Type: Grant
    Filed: November 22, 1993
    Date of Patent: February 7, 1995
    Assignee: AT&T Corp.
    Inventors: Fred L. Heismann, Steven K. Korotky, John J. Veselka
  • Low loss waveguide intersection
    Patent number: 4961619
    Abstract: An optical intersection with reduced transmission loss is described. An embodiment of the inventive interconnection comprises two intersecting waveguides. According to the teachings of the invention, deleterious asymmetric field distortions in the waveguides, associated with the presence of the adjacent waveguides, are reduced by, for example, changing the width of the intersection region, and the widths of the waveguides as they approach the intersection region.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: October 9, 1990
    Assignee: AT&T Bell Laboratories
    Inventors: Jose F. Hernandez-Gil, Steven K. Korotky, Timothy O. Murphy, John J. Veselka