Semiconductor laser output control equipment
文献类型：专利
| 作者 | TAKEYAMA YOSHINOBU; SHIMADA KAZUYUKI; SUGIMURA KEIICHI |
| 发表日期 | 1988-04-16 |
| 专利号 | JP1988086584A |
| 著作权人 | RICOH CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser output control equipment |
| 英文摘要 | PURPOSE:To prevent the deterioration of a semiconductor laser excluding excessive current flow in the semiconductor laser, by driving the semiconductor laser with the output signal of an error amplifier after sample-hold applying a timing signal, and prohibiting the timing signal by a protection circuit when the output signal of a light detection circuit is smaller than or equal to a specified value. CONSTITUTION:A photo-diode generates a current proportional to the light output of a semiconductor laser 1, and an error amplifier 4 amplifies the difference between the output voltage VM of an amplifier 3 and a reference voltage Vref. This value is subjected to sample-hold by a timing signal in a sample-hold circuit 5. A driving circuit 6 for semiconductor laser flows a current corresponding with the output signal of the sample-hold circuit 5 into the semiconductor laser Thereby the driving current of the semiconductor laser 1 is stabilized as a value corresponding with the reference voltage Vref, and the light output of the semiconductor laser 1 is controlled so as to be constant. When the light output of the semiconductor laser 1 is less than or equal to a specified value, and the output signal of the amplifier 3 is less than or equal to the threshold level VTH, a gate 7 turns OFF, the timing signal is prohibited, and the sampling operation of the sample-hold circuit 5 is interruped. |
| 公开日期 | 1988-04-16 |
| 申请日期 | 1986-09-30 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59478]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | RICOH CO LTD |
| 推荐引用方式 GB/T 7714 | TAKEYAMA YOSHINOBU,SHIMADA KAZUYUKI,SUGIMURA KEIICHI. Semiconductor laser output control equipment. JP1988086584A. 1988-04-16. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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