Semiconductor laser
文献类型：专利
| 作者 | SUENAGA HIDEO; SUGIYAMA TOSHIO; YAMAMOTO SETSUO |
| 发表日期 | 1983-10-14 |
| 专利号 | JP1983175146A |
| 著作权人 | HITACHI SEISAKUSHO KK |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser |
| 英文摘要 | PURPOSE:To reduce the optical output variance noise accompanied with the longitudinal mode change of a semiconductor laser and to improve the efficiency of light use, by returning a specific quantity or more of the light of the semiconductor laser by an optical feedback material. CONSTITUTION:Since the noise is reduced rapidly when about >=10% quantity of light is fed back to a semiconductor laser chip, an optical feedback material 17 is fixed on the side of a light emitting chip 13 of a cover glass 14. This optical feedback material 17 is provided with a hollowed part 18, through which a luminous flux (part THETA) used for reading out a signal from a disc passes, and a reflective face 19 which reflects an unused light 16. As the result, if the numerical aperture NA of a coupling lens is 0.15, >=50% quantity of light emitted from the laser is fed back stably; and further, since the actually used luminous flux has no loss, the semiconductor laser which has a high efficiency of light use and has less noise is obtained. |
| 公开日期 | 1983-10-14 |
| 申请日期 | 1982-04-05 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/70478]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI SEISAKUSHO KK |
| 推荐引用方式 GB/T 7714 | SUENAGA HIDEO,SUGIYAMA TOSHIO,YAMAMOTO SETSUO. Semiconductor laser. JP1983175146A. 1983-10-14. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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