Energy assisted magnetic recording disk drive using a distributed feedback laser
US8422342B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2010 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | May 29, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49023
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for providing an energy assisted magnetic recording (EAMR) disk drive are described. The EAMR disk drive includes a media, a slider having a trailing face and an air-bearing surface (ABS), at least one distributed feedback (DFB) layer and at least one EAMR transducer on the slider. The DFB laser(s) each includes a plurality of quantum wells, a laser coupling grating, at least one reflector, and a cavity in the at least one DFB laser. The DFB laser(s) for providing energy to the media. The EAMR transducer(s) includes at least one waveguide, a write pole, at least one coil for energizing the write pole, at least one grating, and may include a near-field transducer. The grating(s) include a coupling grating for coupling the energy from the at least one DFB laser to the waveguide(s). The waveguide(s) direct the energy from the at least one grating toward the ABS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.