Patents by Inventor Karl M. Hamacher

Karl M. Hamacher 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).

  • Integrated optical circuit comprising a polarization convertor
    Patent number: 5838844
    Abstract: An integrated optical circuit includes a first device and a second device, which devices are connected by a polarization convertor. The polarization convertor includes a curved section of a waveguide, integrated in the optical circuit. The curved section may have several differently curved subsections. The conversion ratio is determined in part by the radius of curvature of the curved subsections as well as by the number of transitions between subsections.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: November 17, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis Van Dam, Helmut Heidrich, Karl M. Hamacher, Cornelis A. M. Steenbergen, Meint K. Smit, Carl M. Weinert