发明授权
- 专利标题： Data storage device detecting lasing threshold of laser by measuring protrusion effect
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申请号： US15615050申请日： 2017-06-06
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公开(公告)号： US09786310B1公开(公告)日： 2017-10-10
- 发明人: Hans J. Richter , Robert E. Eaton , Andreas Moser
- 申请人： Western Digital Technologies, Inc.
- 申请人地址： US CA San Jose
- 专利权人： Western Digital Technologies, Inc.
- 当前专利权人： Western Digital Technologies, Inc.
- 当前专利权人地址： US CA San Jose
- 主分类号： G11B5/60
- IPC分类号： G11B5/60 ; G11B21/12
摘要：
A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a laser configured to heat the disk while writing data to the disk. At least four different laser powers are applied to the laser and a fly height of the head over the disk is measured at each laser power. A lasing threshold power for the laser is detected based on the measured fly heights.
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