The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2019
Filed:
Aug. 09, 2018
Government of the United States, As Represented BY the Secretary of the Air Force, Wright-Patterson AFB, OH (US);
Joseph S. Suelzer, Dayton, OH (US);
Nicholas G. Usechak, Oakwood, OH (US);
Preetpaul S. Devgan, Oakwood, OH (US);
Thomas B. Simpson, San Diego, CA (US);
Other;
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.