US Patent Issued to Cisco Technology on Oct. 21 for "High efficiency grating coupler for a laser source" (Pennsylvania Inventors)

ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,449,574, issued on Oct. 21, was assigned to Cisco Technology Inc. (San Jose, Calif.).

"High efficiency grating coupler for a laser source" was invented by Eng Wen Ong (Breinigsville, Pa.) and Mark A. Webster (Bethlehem, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A grating coupler with a wafer bonded configuration includes: a substrate; an oxide layer disposed on the substrate; a silicon nitride layer disposed above the oxide layer; a first silicon layer disposed above the silicon nitride layer; a second silicon layer disposed above the first silicon layer; and a bi-layer grating disposed above the silicon nitride layer. The bi-layer grating incl...