ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,769,179, issued on Oct. 20, was assigned to Xscape Photonics Inc. (Fort Lee, N.J.).

"Wavelength generator based on ring resonator photonic devices" was invented by Yoshitomo Okawachi (River Edge, N.J.), Asher Novick (Long Island City, N.Y.), Samira Karimelahi (Los Gatos, Calif.), Alexander Gaeta (New York) and Vivek Raghunathan (Mountain View, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device includes: a wavelength generator configured to output optical signals at a pump frequency and at first and second frequencies both different from the pump frequency, the wavelength generator including: a planar bus waveguide; a main ring resonator; a f...