Wavelength fluctuation control optical device
文献类型：专利
| 作者 | KATAOKA KEIJI |
| 发表日期 | 1988-12-26 |
| 专利号 | JP1988317935A |
| 著作权人 | HITACHI LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Wavelength fluctuation control optical device |
| 英文摘要 | PURPOSE:To suppress the wavelength fluctuation due to the change of environmental temperature or the like and to eliminate the need of correction of chromatic aberration by controlling the current injected to a pn-junction part monolithically arranged adjacent to a semiconductor laser. CONSTITUTION:Elements 3 and 4 of a monolithically formed laser array are operated as the laser and the pn-junction diode respectively. A laser beam 5 emitted from the element 3 is made incident on a grating 7 through a lens 6. The grating 7 diffracts the laser beam 5 in proportion to the wavelength, and the diffracted light is made incident on a two-dividing photodetector 8. When it is made incident on the center of the photodetector 8 with a prescribed laser wavelength, the difference signal of the detector due to the change of wavelength is applied as the control current to the element 4 through a differential amplifier 9 to keep the laser wavelength constant. Thus, it is unnecessary to correct chromatic aberration. |
| 公开日期 | 1988-12-26 |
| 申请日期 | 1987-06-22 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59513]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI LTD |
| 推荐引用方式 GB/T 7714 | KATAOKA KEIJI. Wavelength fluctuation control optical device. JP1988317935A. 1988-12-26. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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