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文献类型：专利
| 作者 | SUGYAMA TOSHIO; SUENAGA HIDEO |
| 发表日期 | 1993-12-09 |
| 专利号 | JP1993085970B2 |
| 著作权人 | HITACHI |
| 国家 | 日本 |
| 文献子类 | 授权发明 |
| 其他题名 | - |
| 英文摘要 | PURPOSE:To reduce optical output variation noizes, and also to increase the light utilizing efficiency, by feeding back a prescribed quantity of a reflected ray from a disk used for reading out a signal of a semiconductor laser, to the semiconductor laser. CONSTITUTION:A luminous flux of a laser diode 1 becomes a parallel luminous flux by a coupling lens 2, passes through a 1/4 wavelength plate 4 whose optical axis is set to 60 deg. against a polarized prism 3 and the incident polarizing direction, and is focused to a signal face of a disk 6. The reflected ray goes backward, and light of 80% is reflected by the polarized prism 3, is made incident to a photodetector 7, and also light of 20% transmits the polarized prism 3 and is fed back to the laser diode Accordingly, a noise which follows a variation of a longitudinal mode of the laser 1 is reduced, a signal of a good quality is obtained, and also the light utilizing efficiency is increased. |
| 公开日期 | 1993-12-09 |
| 申请日期 | 1982-01-22 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/70465]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | HITACHI |
| 推荐引用方式 GB/T 7714 | SUGYAMA TOSHIO,SUENAGA HIDEO. -. JP1993085970B2. 1993-12-09. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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