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

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,336, issued on Sept. 8, was assigned to Sumitomo Osaka Cement Co. Ltd. (Tokyo).

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

According to the abstract* released by the U.S. Patent & Trademark Office: "In an optical waveguide device, absorption of light by a control electrode is suppressed and peeling of a dielectric layer is prevented. An optical waveguide device of the present invention includes a substrate on which a rib type optical waveguide is formed, and a control electrode disposed next to the optical wavegu...