HAMR recording head with external cavity laser using a near-field transducer as a reflector
US11823708B1 · kind B1 · utility
0Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2022 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jul 29, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/1237
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.