Grating coupled laser for Si photonics
US11435522B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2019 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Sep 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/2027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A grating coupled laser (GCL) includes an active section and a passive section. The passive section is butt coupled to the active section to form a butt joint with the active section. The active section includes an active waveguide. The passive section includes a passive waveguide, a transmit grating coupler, and a top cladding. The passive waveguide is optically coupled end to end with the active waveguide and includes a first portion and a second portion. The first portion of the passive waveguide is positioned between the second portion of the passive waveguide and the active waveguide. The transmit grating coupler is optically coupled to the passive waveguide and includes grating teeth that extend upward from the second portion of the passive waveguide. The top cladding is positioned directly above the first portion of the passive waveguide and is absent directly above at least some of the transmit grating coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.