US 12,442,977 B2
Dual-layer edge couplers with curved coupling-assistance features
Yusheng Bian, Ballston Lake, NY (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Mar. 27, 2023, as Appl. No. 18/126,745.
Prior Publication US 2024/0329299 A1, Oct. 3, 2024
Int. Cl. G02B 6/12 (2006.01); G02B 6/122 (2006.01); G02B 6/125 (2006.01)
CPC G02B 6/12004 (2013.01) [G02B 6/1228 (2013.01); G02B 6/125 (2013.01); G02B 2006/12104 (2013.01); G02B 2006/12121 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure for an edge coupler, the structure comprising:
a semiconductor substrate;
a dielectric layer on the semiconductor substrate;
a first waveguide core on the dielectric layer, the first waveguide core including a first curved section and a first end that terminates the first curved section;
a second waveguide core including a first section that is tapered; and
a third waveguide core on the dielectric layer, the third waveguide core including a curved section and an end that terminates the curved section,
wherein the first waveguide core is positioned between the second waveguide core and the semiconductor substrate, the third waveguide core is positioned between the second waveguide core and the semiconductor substrate, the second waveguide core overlaps with a portion of the first curved section of the first waveguide core, and the second waveguide core overlaps with a portion of the curved section of the third waveguide core.