Coupling distribution feedback type semiconductor laser
文献类型：专利
| 作者 | SUGIMURA AKIRA; KIMURA TATSUYA |
| 发表日期 | 1989-09-14 |
| 专利号 | JP1989231390A |
| 著作权人 | 日本電信電話株式会社 |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Coupling distribution feedback type semiconductor laser |
| 英文摘要 | PURPOSE:To provide a semiconductor laser for optical FM which operates stably by dividing DFB laser to four parts, by coupling each part through lambda/4 phase shift, and by applying thereto uniform bias current and fixed modulation current whose sign is reverse in quadrupole. CONSTITUTION:DFB lasers 101-104 are adhered closely each other and modulation of active layer width to provide each distribution feedback is composed so that its phase deviates by 1/2 wavelength. A fixed current not less than the threshold is made flow to each of electrodes 5, 6 for laser oscillation and dissimilar modulation current is further applied to each of the electrodes 5, 6. The carrier density of the first active layer 1 of each of DFB lasers 101-104 thereby changes. Optical wave between regions of DFB lasers 101-104 receives lambda/4 phase shift. When injected current changes, the amplitude of input/output light and optical frequency also generally change. Current modulation which has reverse sign and equal amplitude are applied to the first - fourth DFB lasers 101-104, that is, I, IV regions and II, III regions of I-IV regions. |
| 公开日期 | 1989-09-14 |
| 申请日期 | 1988-03-11 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/63144]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | 日本電信電話株式会社 |
| 推荐引用方式 GB/T 7714 | SUGIMURA AKIRA,KIMURA TATSUYA. Coupling distribution feedback type semiconductor laser. JP1989231390A. 1989-09-14. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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