Heat-assisted magnetic recording device capable of detecting head malfunction based on different currents of sensors
文献类型：专利
| 作者 | CHU, ALFREDO SAM; ZHU, WENZHONG; RAUSCH, TIM |
| 发表日期 | 2017-05-16 |
| 专利号 | US9653121 |
| 著作权人 | SEAGATE TECHNOLOGY LLC |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Heat-assisted magnetic recording device capable of detecting head malfunction based on different currents of sensors |
| 英文摘要 | A method comprises storing a first laser current value in response to a photodetector sensing that a threshold current for a laser diode of a HAMR head has been reached, the photodetector situated proximate the laser diode. The method also comprises storing a second laser current value in response to a sensor sensing that the threshold current for the laser diode has been reached, the sensor situated away from the laser diode. The method further comprises determining a difference (delta) between the first and second laser current values, repeating the storing and determining processes during subsequent use of the laser diode, and detecting a change in the delta indicative of a malfunction of the head. |
| 公开日期 | 2017-05-16 |
| 申请日期 | 2016-03-18 |
| 状态 | 授权 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33127]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | SEAGATE TECHNOLOGY LLC |
| 推荐引用方式 GB/T 7714 | CHU, ALFREDO SAM,ZHU, WENZHONG,RAUSCH, TIM. Heat-assisted magnetic recording device capable of detecting head malfunction based on different currents of sensors. US9653121. 2017-05-16. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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