Method of producing a semiconductor laser adapted for use in an analog optical communications system
文献类型：专利
| 作者 | FLYNN, EDWARD J.; MCGRATH, CARL J.; NITZSCHE, PAUL M.; ROXLO, CHARLES B. |
| 发表日期 | 1991-07-23 |
| 专利号 | US5034334 |
| 著作权人 | AMERICAN TELEPHONE AND TELEGRAPH COMPANY, |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Method of producing a semiconductor laser adapted for use in an analog optical communications system |
| 英文摘要 | An advantageous method of fabricating lasers adapted for use in a multichannel analog optical fiber communication system (10), e.g., a CATV system, is disclosed. A laser generally can be used in such a communication system only if it meets, inter alia, very stringent intermodulation specifications. To identify such lasers typically requires extensive testing. It has now been discovered that certain readily determinable parameters can be used to predict the intermodulation behavior of a given device. This discovery makes possible a simpler, and therefore less costly, process of identifying suitable lasers, resulting in a more economical method of making lasers for the stated application. The method comprises measuring the light versus current (L versus I) characteristic of a given laser, determining therefrom the first, second, and possibly higher, order derivatives of L with respect to I, and determining therefrom a parameter that is a predictor of the distortion behavior of the laser. Exemplarily, the quantity is the normalized second order distortion (2HD/C), defined as 20 log (mL sec L/4L min ), where m is the modulation index, and L min and L sec are the first and second derivatives, respectively, of L. 2HD/C has a pronounced minimum at I = Iop, the current at which L sec = 0. Advantageously, lasers are selected that have 2HD/C less than a predetermined value (e.g., -70dbc, with m = 0.04) over a relatively wide current range (e.g., at least 4 mA). |
| 公开日期 | 1991-07-23 |
| 申请日期 | 1989-10-13 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/46232]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | AMERICAN TELEPHONE AND TELEGRAPH COMPANY, |
| 推荐引用方式 GB/T 7714 | FLYNN, EDWARD J.,MCGRATH, CARL J.,NITZSCHE, PAUL M.,et al. Method of producing a semiconductor laser adapted for use in an analog optical communications system. US5034334. 1991-07-23. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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