US 11,782,214 B2
Optical fiber coupler having hybrid tapered waveguide segments and metamaterial segments
Bo Peng, Sharon, MA (US); Ajey Poovannummoottil Jacob, Watervliet, NY (US); and 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 Aug. 2, 2022, as Appl. No. 17/816,804.
Application 17/816,804 is a division of application No. 17/170,959, filed on Feb. 9, 2021, granted, now 11,467,343.
Application 17/170,959 is a division of application No. 16/724,507, filed on Dec. 23, 2019, granted, now 10,989,876, issued on Apr. 27, 2021.
Prior Publication US 2022/0381988 A1, Dec. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 6/26 (2006.01)
CPC G02B 6/26 (2013.01) 20 Claims
OG exemplary drawing
 
1. An optical coupler structure comprising:
a waveguide in a first insulator and comprising waveguide metamaterial segments separated from one another and aligned along a first line;
a second insulator on the first insulator and the waveguide; and
a coupler structure in the second insulator aligned along a second line,
wherein the first line and the second line are parallel and within a plane,
wherein a portion of the waveguide overlaps a portion of the coupler structure,
wherein the waveguide metamaterial segments intersect the plane and have first widths in a direction perpendicular to the plane, and the first widths have a first taper along the first line,
wherein the coupler structure has a second taper along the second line, and
wherein the first taper is different from the second taper where the waveguide overlaps the coupler structure.