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Dynamics of optical pulse amplification and saturation in multiple state quantum dot semiconductor optical amplifiers

机译：多态量子点半导体光放大器中光脉冲放大和饱和的动力学

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摘要

We have developed a novel analytical model, which describes the dynamic characteristics of optical pulse amplification and saturation in three state quantum dot (QD) semiconductor optical amplifiers (SOAs). The model takes into account the effect of the ground state, the excited state and the 2-dimensional wetting layer. The model is simple, accurate and fast, which makes it suitable for device design and characterization. The derived model has been utilized to study large-signal cross-gain modulation and crosstalk in multichannel QD-SOA. Analytical expressions for large signal cross-gain modulation and crosstalk in multichannel SOA are derived. The effect of the dot relaxation/escape lifetimes and energy separation between QD states on cross-gain modulation and crosstalk are also studied. Our calculations show that by reducing QD energy state separation, via engineering the dot size and composition, one can reduce the cross-gain modulation efficiency and reduce crosstalk in multi-channel QD-SOAs.
机译：我们已经开发了一种新颖的分析模型，该模型描述了三态量子点（QD）半导体光放大器（SOA）中光脉冲放大和饱和的动态特性。该模型考虑了基态，激发态和二维润湿层的影响。该模型简单，准确，快速，适用于器件设计和表征。该推导模型已被用于研究多通道QD-SOA中的大信号交叉增益调制和串扰。推导了多通道SOA中大信号交叉增益调制和串扰的解析表达式。还研究了点弛豫/逸出寿命以及QD状态之间的能量分离对交叉增益调制和串扰的影响。我们的计算表明，通过减少QD能量状态分离，通过设计点的大小和组成，可以降低交叉增益调制效率并减少多通道QD-SOA中的串扰。

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