Waveguide having mode converter for heat-assisted magnetic recording device
US10170140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2017 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Jan 23, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write head comprises a waveguide core configured to receive light emitted in a crosstrack direction from a light source at a fundamental transverse electric (TE00) mode. The waveguide core comprises a first turn that receives the light in the crosstrack direction redirects the light to an opposite crosstrack direction and a second turn that redirects the light to a direction normal to a media-facing surface of the write head. The waveguide core comprises a straight section that couples the first and second turns and a branched portion extending from the straight section. The branched portion is configured to convert the light to a higher-order (TE10) mode. A near-field transducer at the media-facing surface is configured to receive the light at the TE10 mode from the waveguide and directs surface plasmons to a recording medium in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.