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 | JP1988086585A |
| 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 make it possible to control stably a semiconductor laser without deteriorating characteristics, by providing a protection circuit which prohibits a timing signal when the output signal of a photo-detector is less than or equal to a specified value, and an initial value set circuit which sets sample mode after a specified time when the reset signal of a circuit system is generated. CONSTITUTION:A photo-diode 2 generates a current proportional to the light output of a semiconductor laser 1, and an error amplifier 4 amplifies the error against a reference voltage Vref. This value is subjected to sample-hold by a timing signal. The driving current of the semicondnctor 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. Further the semiconductor laser 1 is subjected to on/off operation by a modulation signal. When the semiconductor laser 1 is not in the burning state, sampling is prohibited, and an excess current does not flow through the semiconductor laser 1, so that the deterioration of the semiconductor laser 1 can be prevented. The initial value set circuit 10 generates timing signal after a specified time when the reset signal of a circuit system is generated, and sets a sample hold circuit 5 in a state of sample mode through an OR circuit. |
| 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/181661/68891]  |
| 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. JP1988086585A. 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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