US Patent Issued to Sumitomo Osaka Cement on April 21 for "Optical waveguide element, optical modulator, optical modulation module, and optical transmission device" (Japanese Inventors)

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,897, issued on April 21, was assigned to Sumitomo Osaka Cement Co. Ltd. (Tokyo).

"Optical waveguide element, optical modulator, optical modulation module, and optical transmission device" was invented by Norikazu Miyazaki (Tokyo) and Toru Sugamata (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical waveguide device including: an optical waveguide composed of a protruding portion extending on a substrate; a signal electrode that is formed on the substrate and controls light waves propagating through the optical waveguide, in which the optical waveguide includes a Mach-Zehnder optical waveguide including two parallel waveguides having cu...