| Apparatus comprising a laser adapted for emission of single mode radiation having low transverse divergence | |
| CHEN, YOUNG-KAI; HONG, MINGHWEI; WU, MING-CHIANG | |
| 1992-07-01 | |
| 著作权人 | AT&T CORP. |
| 专利号 | EP0492854A2 |
| 国家 | 欧洲专利局 |
| 文献子类 | 发明申请 |
| 其他题名 | Apparatus comprising a laser adapted for emission of single mode radiation having low transverse divergence |
| 英文摘要 | Disclosed is an edge-emitting semiconductor laser that has a single waveguiding structure, and that comprises means (140, 141) for reducing the transverse divergence of the far-field pattern of the laser emission. Typically these means comprise reflecting means (preferably transverse distributed Bragg reflectors) disposed parallel to the junction plane of the laser. Lasers according to the invention can have a highly stable single mode output having a substantially symmetrical far field pattern. Disclosed is also an advantageous method of making ridge-waveguide lasers that can, inter alia, be used to make lasers according to the invention. The method is a self-aligned method that does not comprise any critical alignment steps. Thus it is useful for making lasers that have a very narrow ridge waveguide. Such lasers are desirable because they can suppress lateral higher order modes. |
| 公开日期 | 1992-07-01 |
| 申请日期 | 1991-12-04 |
| 状态 | 失效 |
| 内容类型 | 专利 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/64404]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | AT&T CORP. |
| 推荐引用方式 GB/T 7714 | CHEN, YOUNG-KAI,HONG, MINGHWEI,WU, MING-CHIANG. Apparatus comprising a laser adapted for emission of single mode radiation having low transverse divergence. EP0492854A2. 1992-07-01. |
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