Interferometric waveguide usable in shingled heat assisted magnetic recording in the absence of a near-field transducer
US9064528B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2013 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jun 26, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording (HAMR) head is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The HAMR head includes a slider coupled with the laser and a HAMR transducer coupled with the slider. The HAMR transducer includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and an interferometric waveguide (IWG) optically coupled with the laser. The IWG includes a splitter, a recombination region and arms between the splitter and the recombination region. The arms have multiple optical path lengths. The IWG is configured to provide the energy from the laser to the media by forming an interference pattern in the recombination region. An antinode of the interference pattern is at a region of the media and heats the region of the media for a write operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.