US Patent Issued to Sumitomo Electric Industries on Oct. 28 for "Optical modulator and method of manufacturing optical modulator" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,487, issued on Oct. 28, was assigned to Sumitomo Electric Industries Ltd. (Osaka, Japan).

"Optical modulator and method of manufacturing optical modulator" was invented by Hiroki Mori (Osaka, Japan), Naoya Kono (Osaka, Japan) and Mitsuru Ekawa (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical modulator includes a first mesa waveguide extending in a first direction, and a second mesa waveguide. The first mesa waveguide includes a p-type first semiconductor layer disposed over a substrate, a core layer disposed over the first semiconductor layer, a p-type second semiconductor layer disposed over the core layer, and an n-type thir...