ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,429,401, issued on Sept. 30, was assigned to Intel Corp. (Santa Clara, Calif.).

"Tunable in-pool waveguide and method" was invented by Difeng Zhu (San Diego), Razi Dehghannasiri (Albuquerque, N.M.), David Mathine (Albuquerque, N.M.) and Eveline Rigo (Tijeras, N.M.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A photonics integrated circuit includes a first waveguide and a second waveguide. A portion of the first waveguide has a first cladding with a first refractive index. The second waveguide includes a second cladding with a second refractive index different from the first refractive index. Also disclosed is a test circuit for a photonics integrated...