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

ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,803, issued on April 21, 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 Yumi Murata (Tokyo) and Yuki Kugimoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical waveguide device in which an optical loss is reduced by removing an air bubble inside an adhesive layer for joining a reinforcing member from near an optical waveguide or the like even in a case where a protruding part such as a rib type optical waveguide or a spot size converter is formed on an optical waveguide substrate is provided. An optical wa...