US 11,747,559 B2
Photonic integrated circuit structure with supplemental waveguide-enhanced optical coupling between primary waveguides
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. 25, 2021, as Appl. No. 17/411,106.
Prior Publication US 2023/0064852 A1, Mar. 2, 2023
Int. Cl. G02B 6/12 (2006.01); G02B 6/122 (2006.01)
CPC G02B 6/1228 (2013.01) [G02B 2006/12061 (2013.01); G02B 2006/12097 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a first primary waveguide with a first main body and a first end portion, wherein the first end portion is tapered and has an end wall;
two supplemental waveguides on opposing sides of the first end portion of the first primary waveguide, wherein each supplemental waveguide has a proximal portion positioned laterally adjacent to the first end portion of the first primary waveguide and a distal portion extending beyond the end wall of the first end portion, and wherein the distal portion is tapered; and
a second primary waveguide with a second main body and a second end portion, wherein the second end portion of the second primary waveguide is adjacent to and any one of partially overlays and partially underlays at least the distal portion of each supplemental waveguide.