半導体レーザ駆動回路
文献类型：专利
| 作者 | 二俣 彰男; 小沢 靖之; 森次 政春 |
| 发表日期 | 1995-09-13 |
| 专利号 | JP1995085309B2 |
| 著作权人 | 富士通株式会社 |
| 国家 | 日本 |
| 文献子类 | 授权发明 |
| 其他题名 | 半導体レーザ駆動回路 |
| 英文摘要 | PURPOSE:To obtain a simple driving circuit for semiconductor laser which can cope with both recording and reproducing actions of information, by using a circuit which bypasses the detection current corresponding to a superposed recording current from the total detection current of a laser light intensity detecting part when a recording current is supplied. CONSTITUTION:A compensating circuit 4 controls a drive current I2 so as to keep a fixed level of the optical output Pr. The total detection current I4 of a photodiode 2 is equals to I6+I7, where the total optical output is refeered to as Pw when a record ing current I3 is flowed with superposition to a semiconductor laser LD1 and the superposed detection current of a photodiode 2 corresponding to the current I3 is I7 respectively. Then the current I4 is converted into voltage through the resistance of a laser light intensity detecting part 3. Then only the component of the current I7 is extra and the current I2 changes. here a current I5 flowing to a transistor TR11 is controlled so that the current I7 is supplied to a TR13 of a current extracting circuit 10. The current I7 is proportional to the current I3 and therefore the current I5 can be set easily at I3/k by means of a fixed attenuator 9 as long as a coefficient is defined as 1/k. Thus the constant (k) of the attenuator 9 is set so that I7=I5=I3/k is satisfied. |
| 公开日期 | 1995-09-13 |
| 申请日期 | 1985-02-20 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33239]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | 富士通株式会社 |
| 推荐引用方式 GB/T 7714 | 二俣 彰男,小沢 靖之,森次 政春. 半導体レーザ駆動回路. JP1995085309B2. 1995-09-13. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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