Disk drive compensating for laser induced head protrusion in heat assisted magnetic recording

PK Thayamballi - US Patent 8,456,980, 2013 - Google Patents
6,771,440 B2 8, 2004 Smith 6,804,189 B2* 10/2004 Inase et al.................. 369,275.3
6,950,260 B2 9/2005 Coffey et al. 6,975,472 B2 12/2005 Stover et al. 7,023,647 B2 4/2006 …

Disk drive adjusting fly height actuator to compensate for laser induced head protrusion in heat assisted magnetic recording

A Krichevsky, D Guarisco - US Patent 8,619,508, 2013 - Google Patents
A disk drive is disclosed comprising a head actuated over a disk, wherein the head
comprises a laser operable to heat the disk while writing data to the disk, and a fly height …

Disk drive increasing laser power at beginning of write in heat assisted magnetic recording

PK Thayamballi, W Yan, MR Gibbons… - US Patent …, 2013 - Google Patents
(57) ABSTRACT A disk drive is disclosed comprising a disk comprising a plurality of data
tracks, Wherein each data track comprises a plurality of data sectors. A head is actuated …

HAMR drive fault detection system

PW Burnett, J Trantham - US Patent 9,336,831, 2016 - Google Patents
Anapparatus of the present disclosure includes a controller coupled to a read/write head of a
data storage device wherein the controller is configured to perform various operations. More …

Disk drive calibrating fly height actuator to enable laser biasing during non-write mode

TS Lee - US Patent 8,787,125, 2014 - Google Patents
A disk drive is disclosed comprising a disk, a head comprising a laser operable to heat the
disk while writing data to the disk, and a fly height actuator (FHA) operable to actuate the …

Contact detection using laser modulation

JD Kiely, K Scheppers, D Macken… - US Patent …, 2015 - Google Patents
Some embodiments are directed to an apparatus configured to detect contact using a
thermal sensor signal. The apparatus includes a laser Source configured to produce …

Laser modulation for magnetic recording apparatus

JD Kiely - US Patent 9,318,142, 2016 - Google Patents
A transducer comprises a slider and a laser arrangement. The laser arrangement is
configured to heat a region of a magnetic medium in proximity to the slider and produce …

Dual thermal sensor for HAMR waveguide power monitor and integration with the contact sensor

JT Contreras, L Huang, T Matsumoto, S Ren… - US Patent …, 2015 - Google Patents
Embodiments of the present invention generally relate to a HAMR device having two
temperature sensors. The first temperature sensor is disposed adjacent a waveguide and is …

Slider for heat assisted magnetic recording including a thermal sensor for monitoring laser power

EC Gage, L Zhou, MA Seigler, WA Challener… - US Patent …, 2016 - Google Patents
An apparatus includes a light Source, a slider including a sensor having a resistance or
Voltage that varies with the temperature of the sensor, the sensor being mounted to be …

TAR temperature sensor having faster response time

JT Contreras, FY Huang, L Huang… - US Patent …, 2014 - Google Patents
(57) ABSTRACT TAR enable write heads may use a plasmonic device (eg, an optical
transducer) which uses electromagnetic energy gen erated from a laser to heat the magnetic …