US Patent Issued to Sumitomo Osaka Cement on Sept. 8 for "Optical waveguide element, and optical transmission apparatus and optical modulation device using same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,264, issued on Sept. 8, was assigned to Sumitomo Osaka Cement Co. Ltd. (Tokyo).

"Optical waveguide element, and optical transmission apparatus and optical modulation device using same" was invented by Kosuke Okahashi (Tokyo) and Yu Kataoka (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an optical waveguide device including an optical waveguide, and a spot size converter connected to the optical waveguide, in which a propagation loss is further suppressed even in a case where an insulating layer covering the optical waveguide is disposed. An optical waveguide device includes an optical waveguide 2 formed on a substrate 1, and a spo...