Patents Examined by Minson O Harvey
  • Laser resonators comprising mode-selective phase structures
    Patent number: 6920160
    Abstract: The invention relates to a laser resonator for semiconductor lasers having a waveguiding layer which is disposed between a substrate and a superstrate, the waveguiding layer, the substrate and/or the superstrate of the laser resonator having at least one phase structure which varies locally in such a manner that at least one predetermined laser mode is influenced in its propagation characteristic.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: July 19, 2005
    Assignee: Fraunhofer-Gesellschaft Zur Foerderung der Angewandten Forschung E.V.
    Inventors: Uwe Detlef Zeitner, Reiner Guether