Patents by Inventor Johannes Michael Ostermann

Johannes Michael Ostermann 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).

  • Polarization control of vertical diode lasers by monolithically integrated surface grating
    Patent number: 7333522
    Abstract: There is provided a laser. The laser includes a substrate, a first Bragg reflector layer sequence on the substrate, an active layer sequence on the first Bragg reflector layer sequence, a second Bragg reflector layer sequence on the active layer sequence, and a voltage source for applying a voltage via the active layer sequence to generate a beam of laser radiation. At least one of the first Bragg reflector layer sequence, the active layer sequence or the second Bragg reflector layer sequence includes a layer having a periodic pattern positioned in a direction of the beam to stabilize a polarization of the beam.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: February 19, 2008
    Assignee: Ulm-Photonics
    Inventors: Johannes Michael Ostermann, Pierluigi Debernardi