Optical information transmission method
文献类型：专利
| 作者 | NITTA ATSUSHI; YAMAMOTO NOBORU |
| 发表日期 | 1990-03-28 |
| 专利号 | JP1990087729A |
| 著作权人 | CANON INC |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Optical information transmission method |
| 英文摘要 | PURPOSE:To increase the quantity of information per one pulse and to facilitate the extraction of timing by assigning a different wavelength to each quantization level of a multi-value code and sending the result when multi-value coding information is sent while using light as a medium. CONSTITUTION:An electric multi-value signal is inputted to a wavelength selection circuit 1, in which a current flowing to wavelength control electrodes 16, 17 is adjusted so that a light of a wavelength corresponding to the multi-value information is outputted from a variable wavelength semiconductor laser 2. Then a pulse generator 3 injects a pulse current to an active region electrode 18 of the laser 2 at a prescribed interval at all times and the pulse is synchronized with a multi-value coding pulse. Thus, the optical output from the laser 2 shows a rectangular shape. The optical pulse is sent through an optical fiber 4. On the other hand, the signal is inputted to a photodetector array 6 in the reception section via a multiplexer 5. An output selector 7 recognizes that the largest output among outputs from the array 6 is sent and one of multi-value codes corresponding to the wavelength is selected and outputted as an electric signal. |
| 公开日期 | 1990-03-28 |
| 申请日期 | 1988-09-26 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/63976]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | CANON INC |
| 推荐引用方式 GB/T 7714 | NITTA ATSUSHI,YAMAMOTO NOBORU. Optical information transmission method. JP1990087729A. 1990-03-28. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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