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公开(公告)号：US12236986B2
公开(公告)日：2025-02-25
申请号：US18537957
申请日：2023-12-13
Applicant: Seagate Technology LLC
Inventor： Mark Anthony Gubbins , Christopher Neil Harvey , Aidan Dominic Goggin , Fadi El Hallak , Reshma Anamari Mohandas , Bryn John Howells , Scott Eugene Olson
Abstract: A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary waveguide configured to receive the electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The secondary waveguide configured to receive a portion of the electromagnetic radiation from the primary waveguide. The photodiode configured to receive the portion of the electromagnetic radiation from the secondary waveguide and emit a signal that represents a magnitude of the electromagnetic radiation that the laser emits.
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2.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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3.发明申请公开(公告)号：US20150110145A1
公开(公告)日：2015-04-23
申请号：US14585591
申请日：2014-12-30
Applicant: Seagate Technology LLC
Inventor： Scott Eugene Olson
CPC classification number: H01S5/0425 , G02B6/4274 , G02B6/43 , H01L33/382 , H01L33/385 , H01L33/387 , H01S5/02248 , H01S5/02272 , H01S5/02453 , H01S5/042 , H01S5/20 , H01S5/2202 , H01S5/34
Abstract: A laser diode includes a substrate and a junction layer disposed on the substrate. The junction layer forms a quantum well of the laser diode. The laser diode includes a junction surface having at least one channel that extends through the junction layer to the substrate. The at least one channel defines an anode region and a cathode region. A cathode electrical junction is disposed on the junction surface at the cathode region, and an anode electrical junction is disposed on the junction surface and coupled to the junction layer at the anode region. A cathode metal layer is disposed in at least a trench region of the channel. The cathode metal layer couples the substrate to the cathode electrical junction.
Abstract translation: 激光二极管包括衬底和布置在衬底上的接合层。 结层形成激光二极管的量子阱。 激光二极管包括具有至少一个通道的接合面，该通道延伸穿过接合层到基底。 至少一个通道限定阳极区域和阴极区域。 阴极电接点设置在阴极区域的结表面上，并且阳极电连接点设置在接合面上并且在阳极区域处耦合到接合层。 阴极金属层设置在通道的至少沟槽区域中。 阴极金属层将衬底耦合到阴极电连接。
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公开(公告)号：US20240112696A1
公开(公告)日：2024-04-04
申请号：US18537957
申请日：2023-12-13
Applicant: Seagate Technology LLC
Inventor： Mark Anthony Gubbins , Christopher Neil Harvey , Aidan Dominic Goggin , Fadi El Hallak , Reshma Anamari Mohandas , Bryn John Howells , Scott Eugene Olson
CPC classification number: G11B5/6088 , G11B5/314 , G11B5/4866 , G11B7/126 , G11B13/08 , G11B2005/0021
Abstract: A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary waveguide configured to receive the electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The secondary waveguide configured to receive a portion of the electromagnetic radiation from the primary waveguide. The photodiode configured to receive the portion of the electromagnetic radiation from the secondary waveguide and emit a signal that represents a magnitude of the electromagnetic radiation that the laser emits.
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公开(公告)号：US09799359B1
公开(公告)日：2017-10-24
申请号：US15464910
申请日：2017-03-21
Applicant: Seagate Technology LLC
Inventor： Scott Eugene Olson , Karim Tatah , Yi-Kuei Ryan Wu , Mark Anthony Gubbins , Marcus B. Mooney , Michael James Hardy
CPC classification number: G11B5/314 , G11B5/105 , G11B5/3163 , G11B5/6088 , G11B2005/0021
Abstract: A recording head includes a layer of plasmonic metal deposited on a surface of the recording head. One or more non-self-supporting layers of crystalline material are attached to the plasmonic metal, the one or more layers of crystalline materials configured to form an active region of a laser. A waveguide is configured to receive plasmons from the laser and direct the plasmons to a recording medium.
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Patent Agency Ranking
公开(公告)号：US09590390B1
公开(公告)日：2017-03-07
申请号：US15004239
申请日：2016-01-22
Applicant: Seagate Technology LLC
Inventor： Karim Tatah , Scott Eugene Olson
IPC: H01S5/06 , H01S5/068 , H01S5/10 , H01S5/0625 , H01S5/50
CPC classification number: H01S5/5027 , G11B5/314 , G11B2005/0021 , H01S5/0625 , H01S5/1021 , H01S5/1039 , H01S5/5018 , H01S2301/163
Abstract: A laser diode has a first gain section having a first length and a second gain section having a second length and aligned with the first gain section. The second gain section is aligned with and coupled to the first gain section along a light output direction. The second length is an integer multiple m of the first length, where m is greater than one.
Abstract translation: 激光二极管具有具有第一长度的第一增益部分和具有第二长度并与第一增益部分对准的第二增益部分。 第二增益部分沿着光输出方向与第一增益部分对准并耦合到第一增益部分。 第二长度是第一长度的整数倍，其中m大于1。
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公开(公告)号：US11908499B1
公开(公告)日：2024-02-20
申请号：US17809722
申请日：2022-06-29
Applicant: Seagate Technology LLC
Inventor： Mark Gubbins , Christopher Neil Harvey , Aidan Goggin , Fadi El Hallak , Reshma Anamari Mohandas , Bryn John Howells , Scott Eugene Olson
CPC classification number: G11B5/6088 , G11B5/314 , G11B5/4866 , G11B7/126 , G11B13/08 , G11B2005/0021
Abstract: A heat-assisted magnetic recording head includes a laser, a near-field transducer, a primary waveguide, a secondary waveguide, and a photodiode. The laser is configured to emit electromagnetic radiation. The near-field transducer is configured to focus and emit an optical near-field. The primary waveguide configured to receive the electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The secondary waveguide configured to receive a portion of the electromagnetic radiation from the primary waveguide. The photodiode configured to receive the portion of the electromagnetic radiation from the secondary waveguide and emit a signal that represents a magnitude of the electromagnetic radiation that the laser emits.
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8.发明授权公开(公告)号：US10176833B1
公开(公告)日：2019-01-08
申请号：US15408637
申请日：2017-01-18
Applicant: Seagate Technology LLC
Inventor： Roger L. Hipwell, Jr. , Scott Eugene Olson
Abstract: A folded lasing cavity comprises at least one bend. The folded lasing cavity is disposed on and configured to emit light along a substrate-parallel plane. An etched facet is on an emitting end of the folded lasing cavity and an etched mirror is on another end of the folding lasing cavity. An etched shaping mirror redirects light received from the etched facet in a direction normal to the substrate-parallel plane.
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公开(公告)号：US20150340051A1
公开(公告)日：2015-11-26
申请号：US14286287
申请日：2014-05-23
Applicant: Seagate Technology LLC
Inventor： Karim Tatah , Michael Allen Seigler , Scott Eugene Olson , Delai Zhou
CPC classification number: H01S5/4068 , G02B6/00 , G11B5/3133 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B2005/001 , G11B2005/0021 , H01S5/4012 , H01S5/4031
Abstract: An apparatus comprises a unitary laser diode comprising an array of two or more active regions, at least one of which outputs a light beam in response to an input current. The apparatus also includes two or more waveguides, each waveguide corresponding to an active region of the array. At least one of the waveguides receives the at least one light beam from the at least one active region.
Abstract translation: 一种装置包括一个单一激光二极管，其包括两个或多个有源区的阵列，其中至少一个有源区响应于输入电流而输出光束。 该装置还包括两个或多个波导，每个波导对应于阵列的有源区。 至少一个波导从至少一个有源区域接收至少一个光束。
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公开(公告)号：US09196278B1
公开(公告)日：2015-11-24
申请号：US14286287
申请日：2014-05-23
Applicant: Seagate Technology LLC
Inventor： Karim Tatah , Michael Allen Seigler , Scott Eugene Olson , Delai Zhou
CPC classification number: H01S5/4068 , G02B6/00 , G11B5/3133 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B2005/001 , G11B2005/0021 , H01S5/4012 , H01S5/4031
Abstract: An apparatus comprises a unitary laser diode comprising an array of two or more active regions, at least one of which outputs a light beam in response to an input current. The apparatus also includes two or more waveguides, each waveguide corresponding to an active region of the array. At least one of the waveguides receives the at least one light beam from the at least one active region.
Abstract translation: 一种装置包括一个单一激光二极管，其包括两个或多个有源区的阵列，其中至少一个有源区响应于输入电流而输出光束。 该装置还包括两个或多个波导，每个波导对应于阵列的有源区。 至少一个波导从至少一个有源区域接收至少一个光束。
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