Mode control in heterogeneously integrated photonics
US12353014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2023 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Mar 8, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2766
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device has first, second and third elements fabricated on a common substrate. The first element supports a first optical mode in an active waveguide structure characterized by a mesa. The second element supports a second optical mode in a passive waveguide structure. The third element, at least partly butt-coupled to the first element, supports an intermediate optical mode in an intermediate waveguide structure characterized by a waveguide core cross section including a shallow step. A tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the second optical mode and the intermediate optical mode. No adiabatic transformation occurs between the intermediate optical mode and the first optical mode. Lithographic alignment marks facilitate precise alignment of the three elements during device fabrication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.