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1.发明授权公开(公告)号：US10192578B1
公开(公告)日：2019-01-29
申请号：US16049331
申请日：2018-07-30
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Tyler Lenn Perry , Karim Tatah , Andrei Dorobantu , Todd Michael Lammers
IPC: G11B5/00 , G11B7/1263 , G11B5/09 , G11B20/18 , G11B5/012
Abstract: A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.
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Patent Agency Ranking
2.发明授权公开(公告)号：US11437068B1
公开(公告)日：2022-09-06
申请号：US16943124
申请日：2020-07-30
Applicant: Seagate Technology LLC
Inventor： Vivek Krishnamurthy , Scott Eugene Olson , Tyler Lenn Perry , John Charles Duda
Abstract: A recording head includes an external cavity laser with an externally mounted part having an active region. The external cavity laser also includes a channel waveguide that delivers light towards a media-facing surface. A near-field transducer functions as a reflector, either alone or in combination with a Bragg grating in the channel waveguide. A reflective back facet of the externally mounted part and the reflector define a resonator of the external cavity laser.
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公开(公告)号：US11798580B1
公开(公告)日：2023-10-24
申请号：US17809607
申请日：2022-06-29
Applicant: Seagate Technology LLC
Inventor： Nils Jan Gokemeijer , James G Wessel , Tyler Lenn Perry , Joseph M Stephan
CPC classification number: G11B5/012 , G11B5/314 , G11B5/6088 , G11B7/126 , G11B13/08 , G11B2005/0021
Abstract: A heat-assisted magnetic recording head includes a slider body, a laser, a submount, and a laser heater. The slider body is configured to contain components of the heat-assisted magnetic recording head. The laser is configured to emit electromagnetic radiation. The submount is configured to couple the laser to the slider body. The laser heater is configured to apply heat to the laser. The laser heater disposed on a surface of the slider body.
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4.发明授权公开(公告)号：US11823708B1
公开(公告)日：2023-11-21
申请号：US17877478
申请日：2022-07-29
Applicant: Seagate Technology LLC.
Inventor： Vivek Krishnamurthy , Scott Eugene Olson , Tyler Lenn Perry , John Charles Duda
IPC: G11B11/105 , G11B5/00 , G11B13/08 , H01S5/14 , H01S5/028 , H01S5/0683 , H01S5/12
CPC classification number: G11B13/08 , H01S5/028 , H01S5/06837 , H01S5/1215 , H01S5/141 , G11B2005/0021
Abstract: An external cavity laser of a recording head includes a channel waveguide that delivers light towards a media-facing surface of the recording head. The laser includes an externally mounted part with an active region having a longitudinal axis corresponding to a light propagation direction of the channel waveguide. The externally mounted part has a reflective back facet and anti-reflective front facet. The laser includes a near-field transducer at an end of the channel waveguide proximate the media facing surface. The reflective back facet and the near-field transducer define a resonator of the external cavity laser.
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5.发明授权公开(公告)号：US10410668B1
公开(公告)日：2019-09-10
申请号：US16249452
申请日：2019-01-16
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Tyler Lenn Perry , Karim Tatah , Andrei Dorobantu , Todd Michael Lammers
IPC: G11B5/00 , G11B7/1263 , G11B5/09 , G11B20/18 , G11B5/012
Abstract: A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.
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6.发明授权公开(公告)号：US10255940B1
公开(公告)日：2019-04-09
申请号：US15408982
申请日：2017-01-18
Applicant: Seagate Technology LLC
Inventor： Declan Macken , Tyler Lenn Perry , Karim Tatah , Andrei Dorobantu , Todd Michael Lammers
IPC: G11B5/00 , G11B7/1263 , G11B5/09 , G11B20/18 , G11B5/012
Abstract: A slider configured for heat-assisted magnetic recording includes a laser diode optically coupled to a waveguide of the slider. A power supply is coupled to the laser diode. A preamplifier is coupled to the power supply. The preamplifier is configured to monitor a forward voltage across the laser diode while operating the laser diode at a constant current during a write operation, detect a change in the forward voltage indicative of laser power instability, and generate a signal in response to detecting the forward voltage change.
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