Ground-state modulation-enhancement by two-state lasing in quantum-dot laser devices
Ground-state modulation-enhancement by two-state lasing in quantum-dot laser devices
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DOI：
10.1063/1.4921173
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发表时间：
2015-05
影响因子：
4
通讯作者：
André Röhm;B. Lingnau;K. Lüdge
中科院分区：
文献类型：
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作者：
André Röhm;B. Lingnau;K. Lüdge
利用微观激励的多能级速率方程模型，我们预测了双态激射量子点激光器基态激射波长的3 dB截止频率的显著增加。在第二条激光谱线开始后，激发态起到高通滤波器的作用，提高了基态对更快调制频率的响应。我们提出了数值模拟的小信号和大信号调制的结果，并比较单，双态激光器件的性能。此外，我们给出了动力学参数的优势，两个状态激光的数据传输能力。
We predict a significant increase of the 3 dB-cutoff-frequency on the ground-state lasing wavelength for two-state-lasing quantum-dot lasers using a microscopically motivated multi-level rate-equation model. After the onset of the second lasing line, the excited state acts as a high-pass filter, improving the ground-state response to faster modulation frequencies. We present both numerically simulated small-signal and large-signal modulation results and compare the performance of single and two-state lasing devices. Furthermore, we give dynamical arguments for the advantages of two-state lasing on data-transmission capabilities.