US Patent Issued to Sumitomo Osaka Cement on Nov. 4 for "Optical waveguide element, optical modulation device using optical waveguide element, and optical transmission device using optical waveguide element" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,306, issued on Nov. 4, was assigned to Sumitomo Osaka Cement Co. Ltd. (Tokyo).

"Optical waveguide element, optical modulation device using optical waveguide element, and optical transmission device using optical waveguide element" was invented by Yuki Kugimoto (Tokyo), Yumi Murata (Tokyo), Yu Kataoka (Tokyo) and Shingo Takano (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an optical waveguide element including spot size conversion means with suppressed optical insertion loss without complicating a manufacturing process. An optical waveguide element includes an optical waveguide substrate (4) having a rib-type optical waveguide (10)...