ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,547,043, issued on Feb. 10, was assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (Daejeon, South Korea).

"Mach-Zehnder interferometric optical modulator with shallow ridge waveguide structure and method for manufacturing the same" was invented by Hyun Soo Kim (Daejeon, South Korea), Ho Sung Kim (Daejeon, South Korea), Yongsoon Baek (Daejeon, South Korea) and Won Seok Han (Daejeon, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed are a Mach-Zehnder interferometric optical modulator and a method for manufacturing the same. The modulator includes first and second lower clad layers stacked on a substrate, a core layer on...