Transfer-matrix analysis of the intensity and phase noise of multisection DFB semiconductor lasers
Transfer-matrix analysis of the intensity and phase noise of multisection DFB semiconductor lasers
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DOI：
10.1109/3.100879
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发表时间：
1991-11
影响因子：
2.5
通讯作者：
T. Makino
中科院分区：
文献类型：
--
作者：
T. Makino
利用基于格林函数法的传输矩阵法，建立了多段分布反馈(DFB)半导体激光器强度谱和相位噪声谱的一般小信号模型。该公式考虑了由于纵场分布不均匀而产生的自发辐射增强和有效幅相耦合效应(有效线宽增强因子)。利用流图表示中的传递函数，给出了多模工作时主模相对强度噪声和调频噪声频谱的解析表达式。该模型考虑了端面反射率和外部光反馈的影响。系统地分析了光栅耦合系数、端面随机光栅位相、相移位置、外光反馈和边模等因素对激光器噪声频谱的影响。>；
A general small-signal model for the intensity and phase noise spectra of multisection distributed feedback (DFB) semiconductor lasers is developed by using the transfer-matrix approach based on the Green's function method. The spontaneous emission enhancements due to nonuniform longitudinal field distribution and the effective amplitude-phase coupling effect (the effective linewidth enhancement factor) are taken into account in the formulation. Analytical expressions for the spectra of the relative intensity noise and the FM noise of the main mode in the multimode operation are presented by using the transfer functions in a flow-graph representation. Facet reflectivities and external optical feedback are included in the model. The effects of the grating coupling coefficient, the random grating-phase at the facets, the phase-shift position, the external optical feedback, and the side mode on the noise spectra are analyzed systematically for a lambda /4-shifted DFB laser. >