Sampled grating distributed feedback (SG DFB) semiconductor laser diode
- 作者：S.N. Mohammad
- 关键词：Sampled grating ; Distributed feedback ; Empty region
- 刊名：Optics and Laser Technology
- 出版年：2007
- 期刊代码：48_00303992
- 类别：ph
- 出版时间：June 2007
- 卷：39
- 期：4
- 页码：754-757
- 文件大小：157 K
摘要
A laser diode was designed using a method called sampled grating (SG) distributed feedback (DFB), in which the couplings have been distributed in certain regions along the laser cavity (i.e., regions contain grating). These regions play a big role in pushing the main mode to propagate faster than the side mode by increasing the time delay between them. This delay is due to the empty regions (i.e., regions without grating) along the laser cavity. Neither a phase shift nor incomplete grating have been taken into account with the new structure. The theoretical model in the present work is based on the coupled-mode equations which have been solved numerically by the mean of transfer matrix method (TMM).