公开(公告)号：US20120327751A1

公开(公告)日：2012-12-27

申请号：US13404024

申请日：2012-02-24

申请人： Yasuhiko IWANABE ,  Harukazu MIYAMOTO

发明人： Yasuhiko IWANABE ,  Harukazu MIYAMOTO

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G02B6/1228 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally assisted recording magnetic head is provided in which a magnetic recording medium can be irradiated with light having a spot size reduced in the submicron order with high total optical propagation efficiency. In a magnetic head, a spot size converter that propagates the light from an optical source in the magnetic head is provided adjacent to a main pole. The spot size converter includes a cover layer having a refractive index lower than that of a clad material and formed in contact with the optical waveguide core, and is formed in a shape composed of a substantially rectangular shape in a light traveling direction and a tapered shape where the width is increased toward the bottom surface of the magnetic head. The optical waveguide core having the cover layer formed is vertically interposed between multi-mode-thin-film-like cores that can excite a first or higher-order optical waveguide mode.

摘要翻译： 提供了一种热辅助记录磁头，其中磁记录介质可以以具有高总光传播效率的亚微米级的光斑尺寸减小的光照射。 在磁头中，在主磁极附近设置从磁头中的光源传播光的光斑尺寸转换器。 光斑尺寸转换器包括折射率低于包覆材料并与光波导芯接触形成的覆盖层，并且形成为在光行进方向上形成为大致矩形形状的锥形形状 其中宽度朝向磁头的底表面增加。 形成有覆盖层的光波导芯垂直地插入在能够激发第一或更高阶光波导模式的多模式薄膜状芯之间。

公开(公告)号：US20110090770A1

公开(公告)日：2011-04-21

申请号：US12903276

申请日：2010-10-13

申请人： Yasuhiko IWANABE ,  Takuya Matsumoto ,  Junichiro Shimizu ,  Harukazu Miyamoto

发明人： Yasuhiko IWANABE ,  Takuya Matsumoto ,  Junichiro Shimizu ,  Harukazu Miyamoto

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： Provided is a thermal-assisted-magnetic-recording head capable of directing, to a magnetic recording medium, light in which the spot size is reduced to submicron order with high total optical propagation efficiency. A light coupling unit that guides light emitted from the light source into a magnetic head and a high-refractive-index core that couples with the light guided by the light coupling unit to lead the light to an air bearing surface are arranged in the magnetic head. The light coupling unit includes a plurality of thin-film-like cores that are separated from each other by a clad material. An upper part of the high-refractive-index core is placed between two thin-film-like cores.

摘要翻译： 提供了一种热辅助磁记录头，其能够将光斑尺寸减小到亚微米级的高的总光传播效率的光记录介质。 将从光源发射的光引导到磁头中的光耦合单元和与由光耦合单元引导的光耦合以将光引导到空气轴承表面的高折射率芯布置在磁头中 。 光耦合单元包括通过包层材料彼此分离的多个薄膜状芯。 高折射率芯的上部放置在两个薄膜状芯之间。