US 11,719,895 B1
Spot-size converters with angled facets
Yusheng Bian, Ballston Lake, NY (US); Nicholas Polomoff, Hopewell Junction, NY (US); Keith Donegan, Saratoga Springs, NY (US); Qizhi Liu, Lexington, MA (US); and Steven M. Shank, Jericho, VT (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Feb. 24, 2022, as Appl. No. 17/679,188.
Int. Cl. G02B 6/42 (2006.01); H01S 5/02251 (2021.01); G02B 1/00 (2006.01)
CPC G02B 6/4212 (2013.01) [G02B 6/421 (2013.01); G02B 6/4245 (2013.01); H01S 5/02251 (2021.01); G02B 1/002 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
an edge coupler including a waveguide core having an end surface and a longitudinal axis, the end surface defining a first plane tilted in a first direction at a first acute angle relative to the longitudinal axis and tilted in a second direction at a second acute angle relative to the longitudinal axis, and the second direction different than the first direction; and
a dielectric layer having an interface with the end surface of the waveguide core and a surface that is tilted at a third acute angle relative to the longitudinal axis,
wherein the dielectric layer comprises a first material, and the waveguide core comprises a second material having a different refractive index than the first material.