- 专利标题: Secondary alignment waveguide with polarization rotator
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申请号: US15463238申请日: 2017-03-20
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公开(公告)号: US10014016B1公开(公告)日: 2018-07-03
- 发明人: Reyad Mehfuz , Aidan Dominic Goggin , Kelly Elizabeth Hamilton , John Bernard McGurk , Choon How Gan
- 申请人: Seagate Technology LLC
- 申请人地址: US CA Cupertino
- 专利权人: Seagate Technology LLC
- 当前专利权人: Seagate Technology LLC
- 当前专利权人地址: US CA Cupertino
- 代理机构: Hollingsworth Davis, LLC
- 主分类号: G11B11/00
- 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
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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