ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,990, issued on Oct. 14, was assigned to Intel Corp. (Santa Clara, Calif.).

"Technologies for coupling from photonic integrated circuits with an optical isolator" was invented by Alexander Krichevsky (Cupertino, Calif.) and Boping Xie (San Ramon, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Technologies for coupling to and from a photonic integrated circuit (PIC) with an optical isolator are disclosed. In one embodiment, light beams from waveguides on a PIC die are reflected towards flat mirrors on the bottom surface of the PIC die. The flat mirrors reflect the light towards curved mirrors defined in a top surface of the PIC die, which colli...