US Patent Issued on June 23 for "Optical waveguide element, and optical modulation device and optical transmission device which use same" (Japanese Inventors)

ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,582, issued on June 23.

"Optical waveguide element, and optical modulation device and optical transmission device which use same" was invented by Toshio Kataoka (Tokyo) and Norikazu Miyazaki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical waveguide device that can efficiently remove a high-order mode light beam and that is also easily manufactured even in a case where a width or a height of an optical waveguide is small is provided. An optical waveguide device includes a substrate 1 on which a rib type optical waveguide 10 is formed, and a slab waveguide SW disposed close to the rib type optical waveguide 10, in which roughness of a...