Patents by Inventor Joseph S. Suelzer

Joseph S. Suelzer 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).

  • Tunable microwave signals based on injection-locked lasers with feedback
    Patent number: 10522965
    Abstract: A system and method for generating optically synthesized microwave signals with broadband tunability is disclosed. The system includes a first laser and a second laser, where the first laser and second laser are optically coupled to each other. The second laser is operable to receive optical signals injected by the first laser, and to output optical signals via one or more feedback paths. The system provides for singular or mutual optical injection. A photodetector is optically coupled to the second laser over the one or more feedback paths, and operable to convert optical signals to electrical signals. A phase modulator is coupled to the photodetector, where the electrical signals from the photodetector are operable to drive the phase modulator and close the one or more feedback paths. The respective lengths of the feedback paths may be selected such that their corresponding lengths provide a frequency spacing for optical signals therein that is significantly smaller than a frequency of microwave signals.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: December 31, 2019
    Inventors: Joseph S. Suelzer, Nicholas G. Usechak, Preetpaul S. Devgan, Thomas B. Simpson
  • TUNABLE MICROWAVE SIGNALS BASED ON INJECTION-LOCKED LASERS WITH FEEDBACK
    Publication number: 20190312404
    Abstract: A system and method for generating optically synthesized microwave signals with broadband tunability is disclosed. The system includes a first laser and a second laser, where the first laser and second laser are optically coupled to each other. The second laser is operable to receive optical signals injected by the first laser, and to output optical signals via one or more feedback paths. The system provides for singular or mutual optical injection. A photodetector is optically coupled to the second laser over the one or more feedback paths, and operable to convert optical signals to electrical signals. A phase modulator is coupled to the photodetector, where the electrical signals from the photodetector are operable to drive the phase modulator and close the one or more feedback paths. The respective lengths of the feedback paths may be selected such that their corresponding lengths provide a frequency spacing for optical signals therein that is significantly smaller than a frequency of microwave signals.
    Type: Application
    Filed: August 9, 2018
    Publication date: October 10, 2019
    Inventors: Joseph S. Suelzer, Nicholas G. Usechak, Preetpaul S. Devgan, Thomas B. Simpson