ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,561, issued on March 25, was assigned to II-VI DELAWARE INC..
"Spot-size converter" was invented by Yasuhiro Matsui (Milpitas, Calif.), Shiyun Lin (San Diego) and David Adams (Stockholm).
According to the abstract* released by the U.S. Patent & Trademark Office: "A spot-size converter includes first and second waveguide structures. The first waveguide structure extends longitudinally along a waveguide axis from a first end to a second end and is configured to support a first optical mode at the first end. The second waveguide structure is formed within the first waveguide structure. The second waveguide structure extends longitudinally between the first end and the second end. T...