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公开(公告)号：US20210327463A1
公开(公告)日：2021-10-21
申请号：US17362117
申请日：2021-06-29
摘要： 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.
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公开(公告)号：US10734019B1
公开(公告)日：2020-08-04
申请号：US16528174
申请日：2019-07-31
发明人： Christopher Neil Harvey , Aidan Dominic Goggin , Kelly Elizabeth Callan , John Bernard McGurk , Reyad Mehfuz
IPC分类号： G11B11/105 , G11B5/48 , G02B6/126 , G02B6/136 , G02B6/132 , G02B6/122 , G11B7/1387 , G02B6/27 , G11B5/60 , G11B5/00
摘要： 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. The layered waveguide includes an interface between the first layer and the second layer, the interface comprises a curve.
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公开(公告)号：US10269379B1
公开(公告)日：2019-04-23
申请号：US15874353
申请日：2018-01-18
摘要： A recording head has a waveguide core with an input facet at an input surface. The waveguide core extends to a near-field transducer at a media-facing surface of the recording head. First and second cladding regions are co-planar with and on either cross-track side of the waveguide core. First and second pseudo-slab regions are co-planar with and on outer cross-track sides of the respective first and second cladding regions. The first and second pseudo-slab regions have an index of refraction higher than that of the first and second cladding regions. The first and second pseudo-slab regions confine and channel stray light away from the near-field transducer.
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公开(公告)号：US11328745B2
公开(公告)日：2022-05-10
申请号：US17362117
申请日：2021-06-29
摘要： 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.
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公开(公告)号：US10014016B1
公开(公告)日：2018-07-03
申请号：US15463238
申请日：2017-03-20
发明人： Reyad Mehfuz , Aidan Dominic Goggin , Kelly Elizabeth Hamilton , John Bernard McGurk , Choon How Gan
IPC分类号： 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分类号： G11B5/6088 , G02B6/125 , G02B6/126 , G11B5/105 , G11B5/314 , G11B7/126 , G11B7/1263 , G11B7/1267 , G11B2005/0021
摘要： 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.
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公开(公告)号：US20200027478A1
公开(公告)日：2020-01-23
申请号：US16446882
申请日：2019-06-20
发明人： Christopher Neil Harvey , Kelly Elizabeth Callan , Aidan Dominic Goggin , John Bernard McGurk , Reyad Mehfuz , Christopher Gerwyn Ward
IPC分类号： G11B5/48
摘要： A recording head has a waveguide core with an input end proximate an energy source at an input surface of the recording head. The waveguide core couples light from the energy source to a near-field transducer that heats a recording medium in response to the light. An input coupler extends along the waveguide core from the input end to a termination region that is away from the input end in a light propagation direction. The input coupler has a first refractive index between that of the waveguide core and a surrounding material. The input coupler is wider than the waveguide core and has a slanted edge at the termination region. The slanted edge crosses the waveguide core such that the input coupler narrows to a neck away from the waveguide core in a crosstrack direction.
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公开(公告)号：US10388310B1
公开(公告)日：2019-08-20
申请号：US16135251
申请日：2018-09-19
发明人： Christopher Neil Harvey , Aidan Dominic Goggin , Kelly Elizabeth Callan , John Bernard McGurk , Reyad Mehfuz
IPC分类号： G11B11/00 , G11B5/48 , G02B6/122 , G11B11/105 , G11B7/1387 , G02B6/126 , G02B6/132 , G02B6/27 , G02B6/136 , G11B5/00 , G11B5/60
摘要： 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. The layered waveguide includes an interface between the first layer and the second layer, the interface comprises a curve.
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公开(公告)号：US09875761B1
公开(公告)日：2018-01-23
申请号：US15601041
申请日：2017-05-22
CPC分类号： G11B5/4866 , G02B3/0087 , G02B6/32 , G02B6/4212 , G11B2005/0021
摘要： 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.
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公开(公告)号：US11069376B1
公开(公告)日：2021-07-20
申请号：US17024234
申请日：2020-09-17
摘要： 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.
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公开(公告)号：US10431253B1
公开(公告)日：2019-10-01
申请号：US15598506
申请日：2017-05-18
摘要： 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.
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