公开(公告)号：US11176962B1

公开(公告)日：2021-11-16

申请号：US17017167

申请日：2020-09-10

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Reyad Mehfuz ,  John Moloney

IPC: G11B11/105 ,  G11B5/48 ,  H01S5/10 ,  G11B5/00 ,  G11B5/60

Abstract: A heat-assisted magnetic recording head includes a slider body having a waveguide that delivers light to a near-field transducer. The waveguide is optically coupled to an input coupler a of the slider body that receives the light. A laser diode is mounted on or in the slider body. The laser diode has an integral exit facet proximate the input coupler. The exit facet has a curved profile that modifies a shape of the light emitted from the exit facet into the input coupler.

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

IPC: G11B11/105 ,  G11B5/48 ,  G11B5/60 ,  G11B5/31 ,  G11B13/04 ,  G02B6/122 ,  G11B5/00

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

IPC: G11B11/105 ,  G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G02B6/122 ,  G11B5/00

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：US10170140B2

公开(公告)日：2019-01-01

申请号：US15412144

申请日：2017-01-23

Applicant: Seagate Technology LLC

Inventor： Reyad Mehfuz ,  Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  John Bernard McGurk

IPC: G11B11/00 ,  G11B5/48 ,  G02B6/14 ,  G02B6/125 ,  G11B5/00 ,  G11B5/60

Abstract: A write head comprises a waveguide core configured to receive light emitted in a crosstrack direction from a light source at a fundamental transverse electric (TE00) mode. The waveguide core comprises a first turn that receives the light in the crosstrack direction redirects the light to an opposite crosstrack direction and a second turn that redirects the light to a direction normal to a media-facing surface of the write head. The waveguide core comprises a straight section that couples the first and second turns and a branched portion extending from the straight section. The branched portion is configured to convert the light to a higher-order (TE10) mode. A near-field transducer at the media-facing surface is configured to receive the light at the TE10 mode from the waveguide and directs surface plasmons to a recording medium in response thereto.

公开(公告)号：US20180211685A1

公开(公告)日：2018-07-26

申请号：US15412144

申请日：2017-01-23

Applicant: Seagate Technology LLC

Inventor： Reyad Mehfuz ,  Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  John Bernard McGurk

IPC: G11B5/48 ,  G02B6/14 ,  G02B6/125

CPC classification number: G11B5/4866 ,  G02B6/125 ,  G02B6/14 ,  G11B5/6088 ,  G11B2005/0021

Abstract: A write head comprises a waveguide core configured to receive light emitted in a crosstrack direction from a light source at a fundamental transverse electric (TE00) mode. The waveguide core comprises a first turn that receives the light in the crosstrack direction redirects the light to an opposite crosstrack direction and a second turn that redirects the light to a direction normal to a media-facing surface of the write head. The waveguide core comprises a straight section that couples the first and second turns and a branched portion extending from the straight section. The branched portion is configured to convert the light to a higher-order (TE10) mode. A near-field transducer at the media-facing surface is configured to receive the light at the TE10 mode from the waveguide and directs surface plasmons to a recording medium in response thereto.

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

IPC: G11B13/08 ,  G11B5/48

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.

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

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/60 ,  G02B6/122 ,  G11B5/00

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：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

IPC: G11B5/48 ,  G02B6/122 ,  G11B5/60 ,  G11B13/04 ,  G11B5/31

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：US10692525B2

公开(公告)日：2020-06-23

申请号：US16136389

申请日：2018-09-20

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Kelly Elizabeth Callan ,  Reyad Mehfuz ,  Marcus B. Mooney ,  Fadi El Hallak ,  Paula Frances McElhinney

IPC: G11B7/126 ,  G11B11/105 ,  G11B5/48 ,  G11B5/00 ,  G11B7/1263 ,  G11B7/1267 ,  G11B5/60

Abstract: An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.

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

Inventor： Christopher Neil Harvey ,  Aidan Dominic Goggin ,  Kelly Elizabeth Callan ,  Reyad Mehfuz

IPC: G11B5/48 ,  G11B5/31 ,  G11B5/60

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.