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首页> 外文会议>Proceedings of the Summer School on Semiconductor Nanostructures and Optoelectronic Devices >Theory of Pattern-free Pulse-Train amplification in Reduced Dimensional Semiconductor Optical Amplifiers
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Theory of Pattern-free Pulse-Train amplification in Reduced Dimensional Semiconductor Optical Amplifiers

机译：尺寸减小的半导体光放大器中无模式脉冲激励放大的理论

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It was previously predicted that it should be possible to achieve pattern-free amplification at large pump current densities in a QD SOA. The key points to achieve this are to reach a constant maximum gain level due to a complete population inversion of the lowest QD levels, and also because the modal gain is lower in a QD SOA compared to a QW or bulk SOA. Initial calculations have been presented here to investigate the influence of the slower gain saturation typically observed in realistic QD structures. We conclude that the slower saturation does reduce the highest speeds at which pattern-effect-free operation can be achieved for a given drive current but that QD SOAs retain significant promise for pattern-effect-free pulse amplification, as well as for cross-gain and for cross phase modulation.
机译：先前曾预测，在QD SOA中以大泵浦电流密度实现无图形放大应该是可能的。实现此目标的关键点是由于最低QD级别的总体填充反转而达到恒定的最大增益水平，并且因为与QW或批量SOA相比，QD SOA的模式增益更低。此处已进行了初步计算，以研究在实际QD结构中通常观察到的较慢增益饱和的影响。我们得出的结论是，对于给定的驱动电流，较慢的饱和度确实会降低可实现无图案效应操作的最高速度，但是QD SOA对于无图案效应脉冲放大以及交叉增益具有很大的前景并用于交叉相位调制。

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