发明名称 |
MAGNETIC RECORDING SYSTEM USED THERMAL-ASSISTED-MAGNETIC- RECORDING HEAD |
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.
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申请公布号 |
US2012327751(A1) |
申请公布日期 |
2012.12.27 |
申请号 |
US201213404024 |
申请日期 |
2012.02.24 |
申请人 |
IWANABE YASUHIKO;MIYAMOTO HARUKAZU;HITACHI, LTD. |
发明人 |
IWANABE YASUHIKO;MIYAMOTO HARUKAZU |
分类号 |
G11B11/00 |
主分类号 |
G11B11/00 |
代理机构 |
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代理人 |
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地址 |
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