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:
Jun. 02, 2026
Filed:
Jun. 22, 2023
The Government of the United States, As Represented BY the Secretary of the Navy, Washington, DC (US);
Todd H. Stievater, Arlington, VA (US);
Nathan Tyndall, Alexandria, VA (US);
Abstract
Method and apparatuses for photonic filtering using n-stage nonuniform lattice filters are provided. The n-stage nonuniform lattice filters include a plurality of directional coupler-differential delay devices connected in series. Each device includes a directional coupler section and a differential delay section. Each coupler section has a coupling constant. Each differential delay section has a differential delay. The first device receives a pump and a signal. The end-stage directional coupler is connected in series to last device and includes input, through, and cross ports. The end-stage directional coupler has a coupling constant, and at least one of the coupling constants for the directional coupler sections and the coupling constant for the end-stage directional coupler are different. The signal is output on the through port of the end-stage directional coupler, and the pump is output on the cross port of the end-stage directional coupler.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile