公开(公告)号：US12259579B1

公开(公告)日：2025-03-25

申请号：US17806338

申请日：2022-06-10

Applicant: PsiQuantum, Corp.

Inventor： Eric Dudley ,  Stanley Burgos ,  Jin Yao

IPC: G02B6/30

Abstract: A device includes a spot size converter on a substrate. The substrate includes an optical fiber alignment structure formed thereon. The spot size converter is aligned with the optical fiber alignment structure. The spot size converter includes an oxide layer that has a first refractive index and includes a tapered section such that a first end of the spot size converter is smaller than a second end of the spot size converter. The spot size converter also includes a waveguide core in the oxide layer. The waveguide core is tapered and is smaller at the first end than at the second end of the spot size converter. The spot size converter further includes a cladding layer surrounding the oxide layer, the cladding layer having a second refractive index lower than the first refractive index of the oxide layer.