Optical amplifier
文献类型：专利
| 作者 | KIYOKU KATSUAKI; YOSHIKUNI YUZO |
| 发表日期 | 1990-02-28 |
| 专利号 | JP1990058882A |
| 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 | Optical amplifier |
| 英文摘要 | PURPOSE:To enable the unilateral optical amplification wherein noise characteristics are improved, and the influence of return light is eliminated by a polarizer and a Farady rotator by attaching an antireflection film on an active region incidence surface of a distributed reflection type semiconductor laser, and making the light, which has passed through a polarization beam splitter, the Farady rotator and the polarizer, enter into a semiconductor laser. CONSTITUTION:A DBR type semiconductor laser 4 has an active region 5 which performs amplification, and a DBR region 7 which has wave length selecting function based on a diffraction grating 6. A light, which has passed through an antireflection film 10 and entered, is amplified by the active region, subjected to Bragg reflection by the diffraction grating 6 in the DBR region 7, and travels in the active region while being again amplified. This amplified light passes a polarizer 3, and its plane of polarization is subjected to 45 deg. inclination by a Farady rotator 2. As a result, it becomes a vertically polarized wave, and is outputted to a port Y after reflected by a splitter On the other hand, when horizontally polarized wave or vertically polarized wave is inputted to the port Y, it passes the splitter and is not reflected, but it can not pass the polarizer 3, so that it is not amplified by a laser 4. |
| 公开日期 | 1990-02-28 |
| 申请日期 | 1988-08-25 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/82189]  |
| 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 | KIYOKU KATSUAKI,YOSHIKUNI YUZO. Optical amplifier. JP1990058882A. 1990-02-28. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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