Semiconductor laser power control circuit
文献类型：专利
| 作者 | SENOO HIROMI; ARAI SHINICHI |
| 发表日期 | 1986-03-08 |
| 专利号 | JP1986047682A |
| 著作权人 | HITACHI LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser power control circuit |
| 英文摘要 | PURPOSE:To obtain a circuit easy to vary the response characteristics and having a simple construction, by producing current in correspondence to an output value of a counter which increases or decrease the output value according to an output of a comparator comparing the output of a laser light emission monitor with an initial value, and by changing the clock cycle of the counter so as to enable the response characteristics to be selected. CONSTITUTION:The CLK input of a CNT14 is supplied with a SAMPLE CLK signal set to a follow-up frequency and the UP/DOWN input of the CNT14 is supplied with a servo error signal digitized by a comparator 6. A semiconductor laser 3 is caused by driving current ID1 to emit light with a radiation power of P2. Current IM1 flows in an optical detector 4 and a voltage of E1=RIM1 is obtained by the flow resistance 5. The voltage is amplified by an amplifier to a voltage of KE1 and reaches a comparator 6 via a sample holding circuit 8 and an L.P.F.9. The voltage KE1 is compared by the comparator 6 with a reference voltage E0. If KE1 E0, on the contrary, the value of CNT14 is caused to go DOWN to decrease the driving current ID If KE1=E0, the CNT14 goes UP and DOWN repeatedly so as to stabilize the current ID1 at a constant level. |
| 公开日期 | 1986-03-08 |
| 申请日期 | 1984-08-15 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59378]  |
| 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 | SENOO HIROMI,ARAI SHINICHI. Semiconductor laser power control circuit. JP1986047682A. 1986-03-08. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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