Stable single-mode operation of distributed feedback lasers with wirelike active regions
Stable single-mode operation of distributed feedback lasers with wirelike active regions
复制标题
具有线状有源区域的分布式反馈激光器的稳定单模操作
DOI：
10.1109/jstqe.2003.819474
复制
发表时间：
2003
影响因子：
4.9
通讯作者：
S. Arai
中科院分区：
文献类型：
--
作者：
K. Ohira;N. Nunoya;S. Arai
从理论上研究了线状有源区分布反馈(DFB)激光器中稳定的单模运转机制，该机制考虑了各谐振模与周期有源区驻波轮廓的“增益匹配”。结果表明，阻带长侧的谐振模比短波长侧的谐振模具有更高的模式增益，并且振荡发生在距离阻带最近的长波长侧。还分析了解理面对光栅位相的影响。测量了由线状有源区组成的GaInAsP/InP DFB激光器的光谱特性，如亚阈值增益谱和相对于阻带的激光波长，与理论结果吻合较好。最后证实，即使在7300h的室温连续波老化后，在大约10/spl倍/阈值的偏置电流下，仍然保持了稳定的单模工作。
A stable single-mode operation mechanism in distributed feedback (DFB) lasers with wirelike active regions was theoretically investigated by taking into account "gain matching" between standing wave profiles of each resonant mode and periodic active regions. As a result, it was clarified that the resonant modes at the longer wavelength side of the stopband have higher modal gain than those at the shorter wavelength side and that the oscillation takes place at the longer wavelength side resonant mode nearest to the stopband. The influence of the cleaved facet with respect to the grating phase was also analyzed. The measured spectral properties of buried heterostructure GaInAsP/InP DFB lasers consisting of wirelike active regions, such as a subthreshold gain spectrum and the lasing wavelength with respect to the stop band, agreed well with theoretical results. Finally, it was confirmed that a stable single-mode operation was preserved even after a room temperature continuous wave aging of 7300 h at bias current of around 10/spl times/ the threshold.