Semiconductor laser drive circuit
文献类型：专利
| 作者 | KUBOTA SHINJI |
| 发表日期 | 1990-08-15 |
| 专利号 | JP1990206187A |
| 著作权人 | MATSUSHITA ELECTRIC IND CO LTD |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser drive circuit |
| 英文摘要 | PURPOSE:To realize a semiconductor laser drive circuit capable of detecting maximum rating of optical output reliably and causing a semiconductor laser to stop emission of light by providing means which make a reference voltage of a comparator detecting a voltage of the driving state variable such that it always corresponds to driving current with which an optical output is close to the maximum rating, according to a relation between the driving current and the optical output of the laser. CONSTITUTION:An AD converter 20 attached additionally to a conventional laser drive circuit converts a monitor voltage VM 5 as an analog signal into a digital signal VAD 2 A latch 23 holds digital data from a CPU 22 for setting an optical output and DA 1 converts an output from the latch 23 into an analog voltage VD 9. A latch 25 holds digital data from the CPU 22 for setting a predetermined reference voltage that a comparator 16 uses as a reference. A DA 2 converts an output from the latch 25 into an analog voltage. An output of the comparator 16 is inputted into the CPU 22. If the CPU 22 detects any abnormal optical output, the CPU 22 causes a semiconductor laser 1 to stop emission of light. |
| 公开日期 | 1990-08-15 |
| 申请日期 | 1989-02-06 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/69047]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | MATSUSHITA ELECTRIC IND CO LTD |
| 推荐引用方式 GB/T 7714 | KUBOTA SHINJI. Semiconductor laser drive circuit. JP1990206187A. 1990-08-15. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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