Patents by Inventor Steffen Wittek

Steffen Wittek 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).

  • Active transverse mode instability mitigation for high power fiber amplifiers apparatus, methods, and applications
    Patent number: 12548962
    Abstract: Apparatus and methods for mitigating transverse mode instabilities (TMI) in high power fiber amplifiers that does not depend on active feedback loops. The apparatus and method involve the modulation of the amplitude and/or phase of selected spatial mode components of an input signal beam to increase the TMI threshold of the amplifier. Once the desired modal adjustments are made, the beam is input to a mode multiplexer whereupon an optimized output beam can be input to the active fiber of the amplifier system. By increasing the TMI threshold of the amplifier, the amplifier can be operated at higher power before TMI sets in. A control stage of the fiber amplifier system includes (a) a (seed) beam splitting section; (b) an amplitude and phase control component; and (c) a mode multiplexer that maps multiple individual signal beams to different fiber modes.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: February 10, 2026
    Assignee: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Steffen Wittek, Juan Carlos Alvarado Zacarias, Daniel Cruz Delgado, Jose Enrique Antonio Lopez, Rodrigo Amezcua Correa, Matthew Cooper
  • ACTIVE TRANSVERSE MODE INSTABILITY MITIGATION FOR HIGH POWER FIBER AMPLIFIERS APPARTUS, METHODS, AND APPLICATIONS
    Publication number: 20220158405
    Abstract: Apparatus and methods for mitigating transverse mode instabilities (TMI) in high power fiber amplifiers that does not depend on active feedback loops. The apparatus and method involve the modulation of the amplitude and/or phase of selected spatial mode components of an input signal beam to increase the TMI threshold of the amplifier. Once the desired modal adjustments are made, the beam is input to a mode multiplexer whereupon an optimized output beam can be input to the active fiber of the amplifier system. By increasing the TMI threshold of the amplifier, the amplifier can be operated at higher power before TMI sets in. A control stage of the fiber amplifier system includes (a) a (seed) beam splitting section; (b) an amplitude and phase control component; and (c) a mode multiplexer that maps multiple individual signal beams to different fiber modes.
    Type: Application
    Filed: November 19, 2021
    Publication date: May 19, 2022
    Applicant: UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Steffen Wittek, Juan Carlos Alvarado Zacarias, Daniel Cruz Delgado, Jose Enrique Antonio Lopez, Rodrigo Amezcua Correa, Matthew Cooper