| 发明名称 |
CONTROLLING LASER OUTPUT IN A HAMR DEVICE |
| 摘要 |
A method of controlling laser output in a heat assisted magnetic recording device can be performed by control circuitry in a data storage device. The method includes measuring a temperature, measuring laser output power of a laser, determining a power error by subtracting an optimal laser output power from the measured laser output power and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted. The at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium. |
| 申请公布号 |
US2015332725(A1) |
申请公布日期 |
2015.11.19 |
| 申请号 |
US201414278377 |
申请日期 |
2014.05.15 |
| 申请人 |
Seagate Technology LLC |
发明人 |
Rausch Tim;Trantham Jon D.;Dykes John W.;YANG Won Choul |
| 分类号 |
G11B7/1263 |
主分类号 |
G11B7/1263 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method comprising:
measuring a temperature; measuring laser output power of a laser in a heat assisted magnetic recording device; determining a power error by subtracting an optimal laser output power from the measured laser output power; and comparing the power error to at least one threshold to determine whether an applied current to the laser needs to be adjusted, wherein the at least one threshold is related to how great the power error can be while maintaining the integrity of data on a recording medium. |
| 地址 |
Cupertino CA US |
