Taper-based spot-size converter implementing intermediate optical mode converter
US12313882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2022 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Mar 8, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/124
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical coupling device includes an optical waveguide disposed on a substrate. An index of refraction of the optical waveguide is greater than an index of refraction of the substrate. The optical coupling device includes a cladding material disposed alongside and above the optical waveguide. An index of refraction of the cladding material is less than the index of refraction of the optical waveguide. The optical coupling device includes an optical buffering layer disposed within the cladding material above the optical waveguide. The optical buffering layer has an index of refraction greater than the index of refraction of the cladding material. The optical buffering layer is positioned a distance away from a top surface of the optical waveguide so as to guide an input optical mode at controlled vertical level relative to the optical waveguide, with the input optical mode overlapping the optical waveguide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.