	US 12,265,254 B1
	Self-aligned fabrication process for coupling of photonic waveguides
Bartholomeus Johannes Machielse, Somerville, MA (US); Denis Sukachev, Brookline, MA (US); Beibei Zeng, Medford, MA (US); Mihir Keshav Bhaskar, Cambridge, MA (US); and David Sarkis Levonian, Cambridge, MA (US)
Assigned to LIGHTSYNQ TECHNOLOGIES INC., Cambridge, MA (US)
Filed by LIGHTSYNQ TECHNOLOGIES INC., Cambridge, MA (US)
Filed on Sep. 29, 2022, as Appl. No. 17/936,782.
Int. Cl. G02B 6/122 (2006.01); G02B 6/30 (2006.01); G06N 10/40 (2022.01); G02B 6/12 (2006.01); G02B 6/132 (2006.01); G02B 6/136 (2006.01)

CPC G02B 6/1228 (2013.01) [G02B 6/305 (2013.01); G06N 10/40 (2022.01); G02B 2006/1204 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12176 (2013.01); G02B 6/132 (2013.01); G02B 6/136 (2013.01)]

20 Claims

12. A 3D photonic structure, comprising:

a substrate; and

a photonically coupled waveguide region, comprising:

a first photonic waveguide layer deposited onto the substrate; and

a second photonic waveguide layer bonded to the first photonic waveguide layer,

wherein:

the 3D photonic structure is configured to transport light between the first photonic waveguide layer and the second photonic waveguide layer via the photonically coupled waveguide region; and

the first photonic waveguide layer and the second photonic waveguide layer have been photonically coupled via a self-aligned fabrication process.