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    Bolometer with temperature compensation for internal laser power monitoring in heat-assisted magnetic recording device
    63.
    发明授权
    Bolometer with temperature compensation for internal laser power monitoring in heat-assisted magnetic recording device 有权

    公开(公告)号：US10410669B1

    公开(公告)日：2019-09-10

    申请号：US16170462

    申请日：2018-10-25

    Applicant: Seagate Technology LLC

    Inventor： James Gary Wessel ,  Jon Karsten Klarqvist ,  John Charles Duda

    IPC: G01J1/42 ,  G01J5/22 ,  G11B7/13 ,  G11B5/48 ,  G11B5/00

    Abstract: A slider configured for heat-assisted magnetic recording comprises an optical sensor coupled to first and second bond pads. The optical sensor comprises a bolometer and a reference sensor. The bolometer is situated at a location of the slider that receives at least some of the light and exposed to an ambient temperature at the slider. The bolometer produces a signal in response to a change in the ambient temperature and the change in output optical power. The reference sensor is situated at a location of the slider unexposed to the light and exposed to the ambient temperature. The reference sensor is coupled to the bolometer and configured to produce a signal in response to the change in the ambient temperature. The optical sensor is configured to generate a sensor signal indicative of changes in output optical power of a laser source without contribution due to ambient temperature changes.

    Bolometer with low scattering for a heat-assisted magnetic recording slider
    64.
    发明授权
    Bolometer with low scattering for a heat-assisted magnetic recording slider 有权

    公开(公告)号：US10068593B1

    公开(公告)日：2018-09-04

    申请号：US15867331

    申请日：2018-01-10

    Applicant: Seagate Technology LLC

    Inventor： James Gary Wessel ,  Chen Wang

    IPC: G11B27/36 ,  G11B5/31 ,  G11B5/48 ,  G01J5/10 ,  G01J5/08 ,  G11B5/00

    Abstract: A slider configured for heat-assisted magnetic recording has an upper surface, an opposing air bearing surface (ABS), and a body defined between the upper surface and the ABS. The slider comprises a write pole and a near-field transducer (NFT) at or near the ABS. An optical waveguide is configured to receive light from a laser source and comprises a first cladding layer, a second cladding layer, and a core between the first and second cladding layers. The core has a width, a length, and a longitudinal axis oriented along the length of the core. A bolometer is situated within the body of the slider at a location that receives at least some of the light communicated along the waveguide used during a writing operation. The bolometer is spaced apart from the core and comprises a longitudinal axis that is oriented substantially parallel to the longitudinal axis of the core.

    BOLOMETER FOR INTERNAL LASER POWER MONITORING IN HEAT-ASSISTED MAGNETIC RECORDING DEVICE
    69.
    发明申请
    BOLOMETER FOR INTERNAL LASER POWER MONITORING IN HEAT-ASSISTED MAGNETIC RECORDING DEVICE 审中-公开
    用于热辅助磁记录装置内部激光功率监测的测量仪

    公开(公告)号：US20160284372A1

    公开(公告)日：2016-09-29

    申请号：US15051053

    申请日：2016-02-23

    Applicant: Seagate Technology LLC

    Inventor： John Charles Duda ,  Ruoxi Yang ,  James Gary Wessel

    IPC: G11B5/60 ,  G11B5/48

    CPC classification number: G11B11/10547 ,  G11B5/314 ,  G11B5/4866 ,  G11B5/6052 ,  G11B5/607 ,  G11B5/6082 ,  G11B5/6088 ,  G11B11/06 ,  G11B11/10532 ,  G11B11/10543 ,  G11B11/12 ,  G11B11/14 ,  G11B2005/0021

    Abstract: An apparatus comprises a slider having an air-bearing surface (ABS), a write pole at or near the ABS, and a reader at or near the ABS and connected to a pair of reader bond pads of the slider. A near-field transducer (NFT) is formed on the slider at or near the ABS, and an optical waveguide is formed in the slider and configured to receive light from a laser source. A sensor is situated proximal of the write pole at a location within the slider that receives at least some of the light communicated along the waveguide. The sensor may be electrically coupled to the reader bond pads in parallel with the reader, and configured to generate a signal indicative of output optical power of the laser source.

    Abstract translation: 一种装置包括具有空气轴承表面（ABS），ABS或ABS附近的写入极的滑块，以及ABS附近或附近的读取器，并连接到滑块的一对读取器接合焊盘。 在ABS的ABS处或附近的滑块上形成近场换能器（NFT），并且在滑块中形成光波导，并配置为接收来自激光源的光。 传感器位于滑动件的位置附近位于写入极的附近，该位置接收沿着波导传播的至少一些光。 传感器可以与读取器并联地耦合到读取器接合焊盘，并且被配置为产生指示激光源的输出光功率的信号。

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