Optical device
文献类型：专利
| 作者 | KONO KENJI; YASAKA HIROSHI; NAGANUMA MITSURU; ODAKA ISAMU; WAKITA KOICHI |
| 发表日期 | 1992-08-25 |
| 专利号 | JP1992237001A |
| 著作权人 | NIPPON TELEGR & TELEPH CORP |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical device |
| 英文摘要 | PURPOSE:To lower the coupling loss with external light input/output elements, such as SMF, while suppressing the deterioration of a driving voltage and extinction ratio. CONSTITUTION:The refractive index of the core layer 11 of 1st optical waveguides 10, 11, 12 for input/output is set lower than the refractive index of the core layer 6 of 2nd optical waveguides 5, 6, 10 to be optically coupled to the 1st optical waveguides and the thickness of the core layer 11 is set thicker than the thickness of the core layer 6, by which the light spot size in the core layer 11 is increased to decrease the coupling loss and the equiv. refractive indices of the light propagating in both optical waveguides are nearly equaled to enhance the transfer efficiency of the power between both optical waveguides. |
| 公开日期 | 1992-08-25 |
| 申请日期 | 1991-01-21 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/89482]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | NIPPON TELEGR & TELEPH CORP |
| 推荐引用方式 GB/T 7714 | KONO KENJI,YASAKA HIROSHI,NAGANUMA MITSURU,et al. Optical device. JP1992237001A. 1992-08-25. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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