-
公开(公告)号：US11069376B1
公开(公告)日：2021-07-20
申请号：US17024234
申请日：2020-09-17
Applicant: Seagate Technology LLC
Inventor： John Bernard McGurk , Reyad Mehfuz , Christopher Neil Harvey , Aidan Dominic Goggin
Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide having a gap portion is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer (NFT) that directs energy resulting from plasmonic excitation to a recording medium. An optical isolator is disposed over the gap portion.
-
公开(公告)号：US10971179B1
公开(公告)日：2021-04-06
申请号：US16433467
申请日：2019-06-06
Applicant: Seagate Technology LLC
Inventor： Reyad Mehfuz , Aidan Dominic Goggin , Pierre Asselin , Christopher Neil Harvey
Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.
-
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.
-
公开(公告)号：US20240013806A1
公开(公告)日：2024-01-11
申请号：US18371146
申请日：2023-09-21
Applicant: Seagate Technology LLC
Inventor： Aidan Dominic Goggin , John Moloney , Reyad Mehfuz , Chuan Zhong , Christopher Neil Harvey
CPC classification number: G11B13/08 , G11B5/4866 , G11B5/6088
Abstract: A recording head includes a channel waveguide that delivers light to a media-facing surface. A near-field transducer (NFT) is at an end of the channel waveguide and proximate to the media-facing surface. A laser including an active region has a longitudinal axis corresponding to a propagation direction of the channel waveguide. The active region includes a back facet and a front facet proximate the NFT. The front facet has a surface shape configured to suppress back reflection of the light.
-
15.发明授权公开(公告)号：US11443765B2
公开(公告)日：2022-09-13
申请号：US17221945
申请日：2021-04-05
Applicant: Seagate Technology LLC
Inventor： Reyad Mehfuz , Aidan Dominic Goggin , Pierre Asselin , Christopher Neil Harvey
Abstract: A write head includes an input coupler configured to receive light excited by a light source. A waveguide core is configured to receive light from the input coupler at a fundamental transverse electric (TE00) mode. The waveguide core has a first straight portion. The waveguide core has a mode converter portion comprising a branched portion extending from the first straight portion. The mode converter portion is configured to convert the light to a higher-order (TE10) mode, the mode converter portion spaced apart from the input coupler. The waveguide core has a second straight portion between the mode converter portion and a media-facing surface. The write head has a near-field transducer at the media-facing surface, the near-field transducer receiving the light at the TE10 mode from the waveguide and directing surface plasmons to a recording medium in response thereto.
-
Patent Agency Ranking
公开(公告)号：US20210327463A1
公开(公告)日：2021-10-21
申请号：US17362117
申请日：2021-06-29
Applicant: Seagate Technology LLC
Inventor： John Bernard McGurk , Reyad Mehfuz , Christopher Neil Harvey , Aidan Dominic Goggin
Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide having a gap portion is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer (NFT) that directs energy resulting from plasmonic excitation to a recording medium. An optical isolator is disposed over the gap portion.
-
公开(公告)号：US20200152230A1
公开(公告)日：2020-05-14
申请号：US16714919
申请日：2019-12-16
Applicant: Seagate Technology LLC
Abstract: An apparatus includes a first waveguide core extending along a light-propagation direction and configured to receive light from a light source at a combined transverse electric (TE) mode and a transverse magnetic (TM) mode. A second waveguide core is spaced apart from the first waveguide core and is configured to couple light at a TM mode to the second waveguide core. A near-field transducer (NFT) is disposed at a media-facing surface of a write head, the NFT receiving the light from the first waveguide core or the second waveguide core and heating a magnetic recording medium in response thereto.
-
公开(公告)号：US20190035422A1
公开(公告)日：2019-01-31
申请号：US16113034
申请日：2018-08-27
Applicant: Seagate Technology LLC
IPC: G11B5/48
CPC classification number: G11B5/4866 , G11B5/314 , G11B5/6088 , G11B7/126 , G11B2005/0021
Abstract: An apparatus includes a first waveguide core extending along a light-propagation direction and configured to receive light from a light source at a combined transverse electric (TE) mode and a transverse magnetic (TM) mode. A second waveguide core is spaced apart from the first waveguide core and is configured to couple light at a TM mode to the second waveguide core. A near-field transducer (NFT) is disposed at a media-facing surface of a write head, the NFT receiving the light from the first waveguide core or the second waveguide core and heating a magnetic recording medium in response thereto.
-
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.
-
公开(公告)号：US12087338B1
公开(公告)日：2024-09-10
申请号：US17851159
申请日：2022-06-28
Applicant: Seagate Technology LLC
Inventor： Christopher Neil Harvey , Aidan Dominic Goggin , Chuan Zhong
CPC classification number: G11B5/7375 , G11B5/3967 , G11B5/4866 , G11B5/6052
Abstract: Described are heat assisted magnetic read-write heads that include a coupler, a waveguide, a transducer, and appurtenant structures.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.021 seconds)
