US 12,271,030 B2
Optical couplers for transitioning between a single-layer waveguide and a multiple-layer waveguide
Yusheng Bian, Ballston Lake, NY (US); and Won Suk Lee, Malta, NY (US)
Assigned to GlobalFoundries U.S. Inc., Malta, NY (US)
Filed by GlobalFoundries U.S. Inc., Malta, NY (US)
Filed on Sep. 26, 2022, as Appl. No. 17/952,969.
Prior Publication US 2024/0103221 A1, Mar. 28, 2024
Int. Cl. G02B 6/122 (2006.01); G02B 6/12 (2006.01); G02B 6/13 (2006.01)
CPC G02B 6/1228 (2013.01) [G02B 6/13 (2013.01); G02B 6/12002 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12147 (2013.01); G02B 2006/1215 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A structure comprising:
a stacked waveguide core including a first waveguide core and a second waveguide core, the first waveguide core including a first bend and a first tapered section connected to the first bend, the first bend terminating the first waveguide core, the second waveguide core including a second bend and a second tapered section connected to the second bend, the second bend terminating the second waveguide core, and the second tapered section positioned to overlap with the first tapered section; and
a third waveguide core including third bend and a third tapered section connected to the third bend, the third bend terminating the third waveguide core, and the third tapered section positioned adjacent to the first tapered section of the first waveguide core and the second tapered section of the second waveguide core.