US Patent Issued to Apple on Aug. 4 for "Grating coupler with high efficiency" (American, Israeli Inventors)

ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,699,228, issued on Aug. 4, was assigned to Apple Inc. (Cupertino, Calif.).

"Grating coupler with high efficiency" was invented by Nurul Taimur Islam (Cupertino, Calif.), Helen H. Liang (Los Gatos, Calif.), Malcolm J. Northcott (Santa Cruz, Calif.) and Ariel Lipson (Tel Aviv, Israel).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical coupling device includes a first waveguide layer, including a first semiconductor material, which is disposed over a dielectric substrate layer. A dielectric intermediate layer overlies the first waveguide layer. A second waveguide layer, which includes a different, second semiconductor material, is disposed over the di...