Grating coupler with high optical coupling efficiency for SMF
US9971099B2 · kind B2 · utility
1Cited by
2References
11Claims
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Key dates
| Filing date | Sep 13, 2017 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Sep 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/095
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A grating coupler includes a grating including a core and an anti-phase reflection coating provided on at least one part of the grating. The anti-phase reflection coating includes a high refractive index layer and a buffer layer. The high refractive index layer has at least one selected from a plurality of attributes characterizing the high refractive index layer. The at least one selected attribute gradually deceases along a propagation direction of light in the core of the grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.