Waveguide with shaped assistant layer
US9946016B2 · kind B2 · utility
0Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2015 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Sep 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus includes a waveguide extending along a light-propagation direction between a light source and a media-facing surface. The waveguide comprises an assistant layer configured to receive light from a light source, truncated with an intermediate bottom cladding layer. A core layer comprises a coupling end configured to receive light from the assistant layer. The coupling end comprises a taper that widens toward the media-facing surface. A near field transducer is disposed proximate the media-facing surface and is configured to receive the light from the core layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.