Patents by Inventor Andreas Wittman

Andreas Wittman 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).

  • Anti-reflection coatings for semiconductor lasers
    Publication number: 20020191660
    Abstract: A semiconductor laser arranged to emit at a given wavelength has a light emitting facet carrying a phase-shifting anti-reflection coating, whose thickness is one quarter that of the given wavelength. Coupling at the light emitting facet is arranged to take place at the minimum of the standing wave.
    Type: Application
    Filed: November 6, 2001
    Publication date: December 19, 2002
    Inventors: Andreas Wittman, Michael Solar, Ernst-Eberhard Latta, Martin Krejci, Tim Kellner