Semiconductor laser driver
文献类型：专利
| 作者 | SAKURAI TATSUAKI |
| 发表日期 | 1992-03-02 |
| 专利号 | JP1992065178A |
| 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 driver |
| 英文摘要 | PURPOSE:To prevent flow of a current which is not controlled, to eliminate an abnormal light emission and to protect a semiconductor laser against deterioration by providing a quasi-signal input circuit and controlling by ON, OFF of first and second switches at a suitable timing. CONSTITUTION:A power source 7 is turned ON in a state that first and second switches 9, 12 are opened at the initial time of turning ON the power source. Then, when a semiconductor laser 1 actually emits a light, the switch 12 remains opened, and the switch 9 is closed. Thus, a voltage gradually raising through a slow-starter 8 is applied to the anode of the laser In this case, the input of a current controller 5 constitutes a quasi-signal input circuit. A GND level signal is applied to a resistance circuit 11 as a quasi-signal reception signal. When the laser 1 is deenergized, the switch 12 is previously opened to set the input of the controller 5 to a quasi-reception signal, and then the switch 9 is opened. Thus, a current which is not controlled does not flow to prevent emission of an abnormal light. |
| 公开日期 | 1992-03-02 |
| 申请日期 | 1990-07-05 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/69107]  |
| 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 | SAKURAI TATSUAKI. Semiconductor laser driver. JP1992065178A. 1992-03-02. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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