Optical waveguide and thermally-assisted magnetic recording head therewith
文献类型：专利
| 作者 | KOMURA, EIJI; CHOU, TSUTOMU |
| 发表日期 | 2012-09-18 |
| 专利号 | US8270791 |
| 著作权人 | TDK CORPORATION |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Optical waveguide and thermally-assisted magnetic recording head therewith |
| 英文摘要 | An optical waveguide of the invention includes a core that is a waveguide through which light propagates; and a cladding that surrounds the core. The core has a plate shape and includes a wide core base part onto which the light is incident, a taper part that is connected to the core base part and of which a width is gradually tapered along a propagation direction, and a narrow front end core part that is connected to the taper part and that extends along the propagation direction. A grating is provided on one of planar surfaces of the wide core base part, the grating is formed by engraving a number of concave grooves having a rectangular cross section on the planar surface along a width direction thereof, the grating is formed to be optically coupled with laser light that is incident perpendicularly onto the grating formation surface, a frequency (grating pitch: pitch of the concave grooves) of the grating is smaller than a wavelength (defined as a wavelength in the cladding) of the perpendicularly incident laser light, and a groove depth H1 of the grating is formed with respect to a thickness H2 of the core base part so that a relationship H1=(0.33 to 0.67)×H2 is satisfied. |
| 公开日期 | 2012-09-18 |
| 申请日期 | 2010-10-05 |
| 状态 | 授权 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/37478]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | TDK CORPORATION |
| 推荐引用方式 GB/T 7714 | KOMURA, EIJI,CHOU, TSUTOMU. Optical waveguide and thermally-assisted magnetic recording head therewith. US8270791. 2012-09-18. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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