Patents by Inventor Dorothea Wiesmann

Dorothea Wiesmann 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 waveguide element
    Publication number: 20040141691
    Abstract: An optical waveguide element having a cladding layer formed on a substrate and at least one waveguide core formed in the cladding layer for transmitting an optical signal. Two heater sections are provided for shifting a phase of optical signals. The two heater sections show different design. This helps controlling heater induced birefringence.
    Type: Application
    Filed: December 15, 2003
    Publication date: July 22, 2004
    Applicant: International Business Machines Corporation
    Inventors: Dorothea Wiesmann, Bert Offrein