System for coupling radiation into a waveguide
US10082624B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 29, 2015 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Jan 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29323
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photonics integrated device for coupling radiation using flood illumination is disclosed. The photonic integrated device comprises an integrated waveguide, a coupler grating at the surface of the device for coupling radiation from said flood illumination towards the integrated waveguide, and a grating for blocking, reflecting or redirecting radiation away from the coupler grating at the surface of the device. The grating for blocking, reflecting or redirecting radiation away from the coupler grating thereby is positioned relative to the coupler grating so as to prevent at least some radiation from said flood illumination, impinging at the grating for blocking, reflecting or redirecting radiation away from the coupler grating and thus impinging at a position of said surface away from the coupling grating, from being reflected within the device towards the coupler grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.