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    Integrated optical device with improved isolation between the semiconductor laser and the photodetectors
    1.
    发明授权
    Integrated optical device with improved isolation between the semiconductor laser and the photodetectors 失效
    具有改善半导体激光器和光电探测器之间隔离度的集成光学器件

    公开(公告)号：US4716559A

    公开(公告)日：1987-12-29

    申请号：US900792

    申请日：1986-08-27

    Applicant: Shiro Hine

    Inventor： Shiro Hine

    IPC: G11B7/085 ,  G11B7/12 ,  G11B7/124 ,  G11B7/135 ,  G11B7/1384 ,  G02B6/10 ,  G02B6/32

    CPC classification number: G11B7/08547 ,  G11B7/124 ,  G11B7/1384

    Abstract: An optical head for a laser memory disk in accordance with the present invention containing a substrate (1); a waveguide layer (3) formed over a main surface of the substrate; a semiconductor laser (4) provided at an end of the waveguide layer for injecting laser beams into the waveguide; a focusing grating coupler (6) formed on the waveguide layer for focusing the injected laser beams on the disk and introducing beams reflected back from the disk into the waveguide; beam splitters (5) formed on the waveguide layer between the semiconductor laser and the focusing grating coupler, for bisecting each of the reflected beams at a prescribed acute angle; photodetectors (10) for converting the bisected beams into electrical signals; optical isolators (17, 18) formed between the semiconductor laser and the photodetectors.

    Abstract translation: 根据本发明的用于激光存储盘的光学头，其包含基板（1）; 形成在所述基板的主表面上的波导层（3） 半导体激光器（4），设置在所述波导层的端部，用于将激光束注入到所述波导中; 形成在波导层上的聚焦光栅耦合器（6），用于将注入的激光束聚焦在盘上并将从光盘反射回的光束引入波导中; 形成在半导体激光器和聚焦光栅耦合器之间的波导层上的分束器（5），用于以规定的锐角将每个反射光束平分; 用于将平分束转换成电信号的光电探测器（10）; 在半导体激光器和光电检测器之间形成的光隔离器（17,18）。

    Method for compensating for phase variations in an interferometric tapered waveguide in a heat assisted magnetic recording head
    3.
    发明授权
    Method for compensating for phase variations in an interferometric tapered waveguide in a heat assisted magnetic recording head 有权
    用于补偿热辅助磁记录头中的干涉式锥形波导中的相位变化的方法

    公开(公告)号：US09286920B1

    公开(公告)日：2016-03-15

    申请号：US13756379

    申请日：2013-01-31

    Applicant: Western Digital (Fremont), LLC

    Inventor： Yufeng Hu ,  Ut Tran

    IPC: G11B7/00 ,  G11B5/00 ,  G11B5/31 ,  G11B7/1384 ,  G11B7/22

    CPC classification number: G11B5/3163 ,  G02B6/1228 ,  G02B6/125 ,  G11B5/314 ,  G11B5/6088 ,  G11B7/1384 ,  G11B2005/0021

    Abstract: A method fabricates an interferometric tapered waveguide (ITWG) for a heat-assisted magnetic recording (HAMR) transducer. The ITWG is defined from at least one waveguide layer. The waveguide layer(s) include an energy sensitive core layer. The energy sensitive core layer has an index of refraction that varies in response to exposure to energy having a particular wavelength range. The step of defining the ITWG includes defining a plurality of arms for the ITWG. At least one phase difference between the arms is determined. At least one of the arms is exposed to the energy such that the index of refraction of the energy sensitive core layer in the arm(s) is changed and such that the phase difference(s) between the arms is changed.

    Abstract translation: 一种制造用于热辅助磁记录（HAMR）传感器的干涉式锥形波导（ITWG）的方法。 ITWG由至少一个波导层限定。 波导层包括能量敏感芯层。 能量敏感芯层具有响应于具有特定波长范围的能量的曝光而变化的折射率。 定义ITWG的步骤包括为ITWG定义多个臂。 确定臂之间的至少一个相位差。 臂中的至少一个暴露于能量，使得臂中的能量敏感芯层的折射率改变，并且使臂之间的相位差发生变化。

    Submount-integrated photodetector for monitoring a laser for a heat-assisted magnetic recording head
    4.
    发明授权
    Submount-integrated photodetector for monitoring a laser for a heat-assisted magnetic recording head 有权
    用于监测用于热辅助磁记录头的激光器的底座集成光电检测器

    公开(公告)号：US09245553B2

    公开(公告)日：2016-01-26

    申请号：US14089589

    申请日：2013-11-25

    Applicant: HGST Netherlands B.V.

    Inventor： Thomas Dudley Boone, Jr. ,  Takuya Matsumoto ,  Shen Ren

    IPC: G11B11/00 ,  G11B5/48 ,  G11B5/31 ,  G11B5/00 ,  G11B7/1384

    CPC classification number: G11B5/4866 ,  G11B5/105 ,  G11B5/314 ,  G11B5/455 ,  G11B5/6088 ,  G11B7/1384 ,  G11B2005/001 ,  G11B2005/0021

    Abstract: In a heat-assisted magnetic recording hard disk drive, a laser module includes a submount-integrated photodetector configured to receive optical energy from a laser by way of a head slider. The submount may be formed of a semiconductor material such as a crystalline silicon material, and the photodetector may be a photodiode that is integrally formed with the submount. A HAMR head slider may comprise a feedback waveguide configured to guide optical energy from the laser through the slider to a feedback photodiode at an interface of the submount and the slider, to detect the optical energy transmitted through the slider to the slider air bearing surface (ABS). A back facet photodiode may also be integrally formed with the submount and configured to receive back facet optical energy to detect the optical energy generated by the laser.

    Abstract translation: 在热辅助磁记录硬盘驱动器中，激光模块包括配置成通过磁头滑块从激光器接收光能的基座集成光电检测器。 基座可以由诸如晶体硅材料的半导体材料形成，并且光电检测器可以是与底座一体形成的光电二极管。 HAMR磁头滑动器可以包括反馈波导，其被配置为将来自激光器的光能通过滑块引导到在底座和滑块的界面处的反馈光电二极管，以检测通过滑块传递到滑动器空气轴承表面的光能（ ABS）。 背面光电二极管也可以与底座一体地形成，并且被配置为接收背面光能以检测由激光产生的光能。

    Data read/write apparatus and electronic device
    5.
    发明授权
    Data read/write apparatus and electronic device 有权

    公开(公告)号：US11922983B2

    公开(公告)日：2024-03-05

    申请号：US18174700

    申请日：2023-02-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Jia Xu ,  Yuhao Zou ,  Jun Xu

    IPC: G09G3/32 ,  G02B6/42 ,  G11B7/127 ,  G11B7/1372 ,  G11B7/1384

    CPC classification number: G11B7/1372 ,  G02B6/4203 ,  G11B7/127 ,  G11B7/1384

    Abstract: The technology of this application relates to a data read/write apparatus and an electronic device, which relate to the data storage field, and can improve data read/write performance. The data read/write apparatus includes a first laser, configured to output a first optical pulse based on a control signal, where the control signal is a signal obtained based on to-be-written data, a dispersion compensator, configured to perform dispersion compensation on the first optical pulse to output a second optical pulse, and an optical fiber lens, connected to the dispersion compensator by using an optical fiber, and configured to focus the second optical pulse onto an optical storage medium, to write the to-be-written data to the optical storage medium.

    DATA READ/WRITE APPARATUS AND ELECTRONIC DEVICE
    6.
    发明公开
    DATA READ/WRITE APPARATUS AND ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20230223046A1

    公开(公告)日：2023-07-13

    申请号：US18174700

    申请日：2023-02-27

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Jia XU ,  Yuhao ZOU ,  Jun XU

    IPC: G11B7/1372 ,  G02B6/42 ,  G11B7/127 ,  G11B7/1384

    CPC classification number: G11B7/1372 ,  G02B6/4203 ,  G11B7/127 ,  G11B7/1384

    Abstract: The technology of this application relates to a data read/write apparatus and an electronic device, which relate to the data storage field, and can improve data read/write performance. The data read/write apparatus includes a first laser, configured to output a first optical pulse based on a control signal, where the control signal is a signal obtained based on to-be-written data, a dispersion compensator, configured to perform dispersion compensation on the first optical pulse to output a second optical pulse, and an optical fiber lens, connected to the dispersion compensator by using an optical fiber, and configured to focus the second optical pulse onto an optical storage medium, to write the to-be-written data to the optical storage medium.

    Scanning head for an optical disc system
    7.
    发明授权
    Scanning head for an optical disc system 失效
    扫描头用于光盘系统

    公开(公告)号：US4337531A

    公开(公告)日：1982-06-29

    申请号：US149765

    申请日：1980-05-14

    Applicant: Herman W. Willemsen

    Inventor： Herman W. Willemsen

    IPC: G02B26/10 ,  G11B7/09 ,  G11B7/12 ,  G11B7/123 ,  G11B7/13 ,  G11B7/135 ,  G11B7/1384

    CPC classification number: G11B7/1384 ,  G11B7/0937 ,  G11B7/123 ,  G11B7/13 ,  G11B7/0901 ,  G11B7/0909

    Abstract: In a scanning head for an optical disc system, a light beam from a laser is transmitted through a monomode optical fiber and then focussed on a record carrying surface of an optical disc by a converging lens. The end of the fiber can be reoriented within orthogonal planes perpendicular to the plane of the record carrying surface by transducers so as to correct for tracking and timing errors. The laser diode can function both as an emitter and, in an external cavity mode, as a detector of light reflected from the disc. Drive to the transducers is dependent on tracking and speed error signals generated from the detected light. For tracking and speed error compensation, only lens fiber end, and, optionally, a collimating lens, which are of negligible weight, need be moved rather than the entire scanning head. This provides a simple structure having a high frequency response and low power consumption.

    Abstract translation: 在用于光盘系统的扫描头中，来自激光器的光束通过单模光纤传输，然后通过会聚透镜聚焦在光盘的记录载体表面上。 纤维的端部可以通过换能器重新定向在垂直于记录载体表面的平面的正交平面内，以便校正跟踪和定时误差。 激光二极管可以作为发射器起作用，并且在外腔模式中可以作为从盘反射的光的检测器。 传感器的驱动取决于从检测到的光产生的跟踪和速度误差信号。 对于跟踪和速度误差补偿，只有透镜光纤端和可选择的重量轻微的准直透镜才需要移动，而不是整个扫描头。 这提供了具有高频响应和低功耗的简单结构。

    APPARATUS AND METHOD FOR STORING AND RETRIEVING OPTICAL SENSOR CALIBRATION DATA
    8.
    发明申请
    APPARATUS AND METHOD FOR STORING AND RETRIEVING OPTICAL SENSOR CALIBRATION DATA 审中-公开
    用于存储和检索光学传感器校准数据的装置和方法

    公开(公告)号：US20160275982A1

    公开(公告)日：2016-09-22

    申请号：US15071964

    申请日：2016-03-16

    Applicant: Parker-Hannifin Corporation

    Inventor： Howard Austerlitz ,  Lewis Boyd

    IPC: G11B7/124 ,  G11B7/1384 ,  G11B7/1362

    CPC classification number: G06K7/00 ,  G01D5/35316 ,  G01D5/35367 ,  G01N33/22 ,  G11C13/042

    Abstract: An optical storage device for storing data includes at least one optical waveguide for receiving an optical interrogation signal and providing a response to the optical interrogation signal and a plurality of optical elements arranged relative to the at least one optical waveguide. The plurality of optical elements are responsive to the optical interrogation signal provided through the at least one waveguide to return a prescribed data value through the at least one optical waveguide. The plurality of optical elements represent encoded data concerning a function of an optical sensor.

    Abstract translation: 用于存储数据的光学存储装置包括至少一个光波导，用于接收光询问信号并提供对光询问信号的响应以及相对于至少一个光波导布置的多个光学元件。 多个光学元件响应通过至少一个波导提供的光询问信号，以通过至少一个光波导返回规定的数据值。 多个光学元件表示关于光学传感器的功能的编码数据。

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