Patents by Inventor Karin Grosskopf

Karin Grosskopf 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: 5889902
    Abstract: An integrated optoelectronic semiconductor component is presented, which can equally process light signals of any polarization direction. Such semiconductor components are used for digital optical telecommunications. The semiconductor component has active (A) and passive (B) waveguide sections, which comprise a number of semiconductor layers (SP) with so-called multiple quantum well structures. The semiconductor layers (SP) are deposited by a process known as selective area growth (SAG). A portion of the semiconductor layers has a lattice constant which is smaller than the lattice constant of a substrate (SUB). This creates a biaxial tensile strain in these layers. The tensile strain is optimized in the active waveguide sections (A) to attain polarization independence. Furthermore a process is described whereby such a semiconductor component can be manufactured.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: March 30, 1999
    Assignee: Alcatel Alsthom Compagnie Generale d'Electricite
    Inventors: Gert Laube, Michael Schilling, Klaus Wunstel, Wilfried Idler, Karin Grosskopf, Eugen Lach