Distributed reflection laser
文献类型：专利
| 作者 | KATSUTA HIROHIKO; SUEMATSU YASUHARU |
| 发表日期 | 1987-09-29 |
| 专利号 | JP1987221182A |
| 著作权人 | FUJIKURA LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Distributed reflection laser |
| 英文摘要 | PURPOSE:To lessen the reflectivity at the terminal surfaces of the diffraction grating and to improve the wavelength selectivity by a method wherein the plane forms of the terminal parts of the external waveguide layer are formed into a tapered form and moreover, a buried layer is provided in such a way as to cover all the side surfaces of the external waveguide layer. CONSTITUTION:In a distributed reflection type laser which is constituted by forming an active waveguide layer consisting of a gain medium and an external waveguide layer having a diffraction grating on a semiconductor substrate, the plane forms of the terminal parts Ya' and Yb' of external waveguide layer regions Ya and Yb are formed into a smooth tapered form. Moreover, the external waveguide layer regions Ya and Yb are formed into a constitution wherein their points are embedded with a buried layer 31 and are not exposed to the outside. that is, this constitution is formed into a constitution, wherein with the terminal parts of an external waveguide layer 25 formed into a tapered form, the side surfaces of the external waveguide layer 25 are all buried in a buried layer 3 As the terminal parts of the external waveguide layer are formed into a tapered form, the reflectivity at these parts is reduced, whereby the internal reflection is remarkedly decreased and the wavelength selectivity is improved. |
| 公开日期 | 1987-09-29 |
| 申请日期 | 1986-03-24 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/67166]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | FUJIKURA LTD |
| 推荐引用方式 GB/T 7714 | KATSUTA HIROHIKO,SUEMATSU YASUHARU. Distributed reflection laser. JP1987221182A. 1987-09-29. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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