Partly gain-coupled 1.55 mu m strained-layer multiquantum-well DFB lasers
Partly gain-coupled 1.55 mu m strained-layer multiquantum-well DFB lasers
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DOI：
10.1109/3.234429
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发表时间：
1993-06
影响因子：
2.5
通讯作者：
G. P. Li;T. Makino;R. Moore;N. Puetz;K. Leong;H. Lu
中科院分区：
文献类型：
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作者：
G. P. Li;T. Makino;R. Moore;N. Puetz;K. Leong;H. Lu
研制了1.55 μ m增益耦合InGaAsP-InP分布反馈（DFB）激光器，该激光器采用应变层多量子阱（MQW）有源光栅实现混合折射率和增益耦合。由于增益耦合效应，激光器表现出不同的单模行为，包括高的单模产量。利用传输矩阵法对腔长对模式行为的影响进行了实验研究和模拟。实验和理论结果表明，短腔激光器具有比长腔激光器更高的kappa /sub增益/L/ kappa /sub指数/比值和更宽的法布里-珀罗模间距，这些特性使短腔激光器具有高的单模产率（90%）和高的边模抑制比（55 dB）。>
1.55- mu m gain-coupled InGaAsP-InP distributed feedback (DFB) lasers which use a strained-layer multi-quantum-well (MQW) active grating for a mixed index and gain coupling have been fabricated and studied. The lasers exhibit distinct longitudinal-mode behaviour due to gain-coupling effects, including a high single-mode yield. Cavity length dependence of the mode behavior has been experimentally studied and simulated using a transfer-matrix method. Both experimental and theoretical results indicate that the shorter cavity lasers with the present structure have higher kappa /sub gain/L/ kappa /sub inde/ ratios and wider Fabry-Perot mode spacing than the longer cavity ones; these features enable the shorter cavity lasers to have a high single-mode yield (90%) and a high side-mode-suppression ratio (55 dB). >