公开(公告)号：US20180040342A1

公开(公告)日：2018-02-08

申请号：US15784429

申请日：2017-10-16

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  Paula Frances McElhinney ,  Fadi El Hallak

IPC: G11B5/48 ,  G02B6/126 ,  G02B6/132 ,  G02B6/122 ,  G02B6/27 ,  G02B6/136 ,  G11B5/00 ,  G11B5/60 ,  G11B7/1387 ,  G11B11/105

CPC classification number: G11B5/4866 ,  G02B6/1228 ,  G02B6/126 ,  G02B6/132 ,  G02B6/136 ,  G02B6/2726 ,  G02B6/2766 ,  G11B5/6088 ,  G11B7/1387 ,  G11B11/10506 ,  G11B11/1051 ,  G11B2005/0021

Abstract: An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT.

公开(公告)号：US09875761B1

公开(公告)日：2018-01-23

申请号：US15601041

申请日：2017-05-22

Applicant: Seagate Technology LLC

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

IPC: G11B11/00 ,  G11B5/48 ,  G02B3/00 ,  G02B6/32 ,  G02B6/42 ,  G11B5/00

CPC classification number: G11B5/4866 ,  G02B3/0087 ,  G02B6/32 ,  G02B6/4212 ,  G11B2005/0021

Abstract: A gradient-index lens couples light from a laser active region to a waveguide core. The gradient-index lens includes a plurality of bilayers, each of the bilayers having first and second material of respective first and second refractive indices. The bilayers conform to a planar base of the gradient-index lens and further conform to input and output sidewalls of the gradient-index lens. The input sidewall faces the laser active region and the output sidewall faces away from the laser active region. The input and output sidewalls are tilted at respective acute angles relative to the planar base.

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

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

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：US09960570B1

公开(公告)日：2018-05-01

申请号：US15601024

申请日：2017-05-22

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Mark Anthony Gubbins ,  Michael James Hardy ,  Kelly Elizabeth Hamilton

IPC: G11B11/00 ,  H01S5/14 ,  H01S5/042 ,  G11B5/48 ,  G11B5/00 ,  G11B7/126 ,  G11B5/60

CPC classification number: H01S5/14 ,  G11B5/4866 ,  G11B5/6088 ,  G11B7/126 ,  G11B2005/0021 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/08068

Abstract: A slider includes a slot waveguide configured to receive energy from an input surface. The slot waveguide has first and second high-index regions surrounding a middle region that extends along a light propagation direction. The middle region has a refractive index less than that of the first and second high index regions. A near-field transducer is at an output portion of the middle region at media-facing surface. The near-field transducer has first and second plates parallel to the media-facing surface with a gap therebetween. An active laser region has a front facet optically coupled to the input surface of the slider. A reflective back facet of the laser and the near-field transducer define a single optical resonator.

公开(公告)号：US09792937B1

公开(公告)日：2017-10-17

申请号：US15205511

申请日：2016-07-08

Applicant: Seagate Technology LLC

Inventor： Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  Paula Frances McElhinney ,  Fadi El Hallak

IPC: G11B11/00 ,  G11B5/48 ,  G02B6/27 ,  G02B6/126 ,  G02B6/122 ,  G02B6/132 ,  G02B6/136 ,  G11B5/00 ,  G11B7/1387 ,  G11B11/105 ,  G11B5/60

CPC classification number: G11B5/4866 ,  G02B6/1228 ,  G02B6/126 ,  G02B6/132 ,  G02B6/136 ,  G02B6/2726 ,  G02B6/2766 ,  G11B5/6088 ,  G11B7/1387 ,  G11B11/10506 ,  G11B11/1051 ,  G11B2005/0021

Abstract: An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction. The cross sectional area of the second layer is smaller proximate to the input coupler and larger proximate to the NFT.

公开(公告)号：US10515659B2

公开(公告)日：2019-12-24

申请号：US16113034

申请日：2018-08-27

Applicant: Seagate Technology LLC

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

IPC: G11B11/105 ,  G11B5/48 ,  G11B5/60 ,  G11B5/31 ,  G11B5/00 ,  G11B7/126

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：US10062400B1

公开(公告)日：2018-08-28

申请号：US15658636

申请日：2017-07-25

Applicant: Seagate Technology LLC

Inventor： Christopher Neil Harvey ,  Aidan Dominic Goggin ,  Kelly Elizabeth Hamilton ,  Reyad Mefuz

IPC: G11B11/00 ,  G11B5/48 ,  G11B5/00 ,  G11B5/60 ,  G11B7/126

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：US10014016B1

公开(公告)日：2018-07-03

申请号：US15463238

申请日：2017-03-20

Applicant: Seagate Technology LLC

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

IPC: G11B11/00 ,  G11B5/48 ,  G02B6/42 ,  G02B6/126 ,  G02B6/125 ,  G02B6/27 ,  G11B5/31 ,  G11B5/00 ,  G11B7/1263 ,  G11B7/1267 ,  G11B5/60 ,  G11B7/126

CPC classification number: G11B5/6088 ,  G02B6/125 ,  G02B6/126 ,  G11B5/105 ,  G11B5/314 ,  G11B7/126 ,  G11B7/1263 ,  G11B7/1267 ,  G11B2005/0021

Abstract: A recording head has a primary waveguide core with an input end at an input surface of the recording head and extends to a near-field transducer at a media-facing surface of the recording head. A secondary waveguide core is separated from the primary waveguide core by a gap such that light is evanescently coupled from the primary waveguide core to the secondary waveguide core. The secondary waveguide core has first and second bends such that an output end of the secondary waveguide core is parallel to and separated from the primary waveguide core in a cross-track direction. A polarization rotator rotates a polarization of light in the secondary waveguide core such that polarization-rotated light exits the secondary waveguide core at the media-facing surface.

公开(公告)号：US10431253B1

公开(公告)日：2019-10-01

申请号：US15598506

申请日：2017-05-18

Applicant: Seagate Technology LLC

Inventor： John Bernard McGurk ,  Kelly Elizabeth Hamilton ,  Aidan Dominic Goggin ,  Mark Anthony Gubbins

IPC: G02F1/035 ,  G02F1/295 ,  G02B6/26 ,  G02B6/42 ,  G11B11/24 ,  G02B6/125 ,  G02F1/01 ,  G11B5/00

Abstract: An input waveguide is disposed on a substrate-parallel plane and configured to receive light from an input surface. A mode converter joins the input waveguide at a junction away from the input surface. The mode converter converts the light from a fundamental mode to a higher-order mode. An input coupler is proximate to and overlapping the input waveguide parallel to the substrate-parallel plane. The input coupler extending from the input surface to the mode converter and has an asymmetric taper that transitions from a wider crosstrack dimension near the input surface to a narrower crosstrack dimension away from the input surface.

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.