Laser feedback suppressor for heat-assisted magnetic recording
US11227633B1 · kind B1 · utility
0Cited by
6References
18Claims
0Family size
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Key dates
| Filing date | Oct 28, 2020 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Oct 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording head includes a channel waveguide that delivers light to a media-facing surface. A near-field transducer (NFT) is at an end of the channel waveguide and proximate to the media-facing surface. A laser including an active region has a longitudinal axis corresponding to a propagation direction of the channel waveguide. The active region includes a back facet and a front facet proximate the NFT. The front facet has a surface shape configured to suppress back reflection of the light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.