Adaptive laser output control in a HAMR device
US9472229B1 · kind B1 · utility
2Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2015 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Apr 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A current temperature of a data storage device having a heat assisted recording (HAMR) device is measured while in idle. A threshold laser diode power output of the HAMR device is calculated at the current temperature when there is a change between a previous temperature and the current temperature. A new laser diode current that produced the calculated threshold laser diode power output is applied to the HAMR device when there is a change between the currently applied laser diode current and the new laser diode current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.