Patents by Inventor Ludwig GREIF

Ludwig GREIF 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 SEMICONDUCTOR AMPLIFIER
    Publication number: 20210359493
    Abstract: The invention relates, inter alia, to an optical semiconductor amplifier (10), in which a plurality of quantum dots (QD) are arranged in at least one quantum dot layer (21-24) of a semiconductor element (11) of the semiconductor amplifier (10), wherein die semiconductor element (11) has a preferred direction (X) located in the quantum dot layer plane, and elongated quantum dots (QD) are present, each of which is longer in the said preferred direction (X) than in a transverse direction (Y) perpendicular thereto and is likewise located in the quantum dot layer plane.
    Type: Application
    Filed: October 29, 2019
    Publication date: November 18, 2021
    Applicant: TECHNISCHE UNIVERSITÄT BERLIN
    Inventors: Ludwig GREIF, Andrei SCHLIWA