V型锁模VECSELs中的相位非相干光子分子
Phase incoherent photonic molecules in V-shaped mode-locked VECSELs
摘要：
由增益芯片和半导体可饱和吸收体组成的被动锁模垂直外腔面发射半导体激光器（VECSELs）因其优异的性能而受到广泛关注。在这项工作中，我们研究如何本地化的结构和非相干的，非本地绑定，脉冲分子出现在一个长腔VECSELs使用V形腔的几何形状。我们表明，这些状态是与激光关闭状态，它们是可单独寻址。使用基于延迟微分方程的模型，我们证明了脉冲簇的结果从腔的几何形状和非本地耦合与增益介质，这导致局部独立的，但全球范围内绑定的相位，非相干光子分子。使用多时间尺度分析，我们推导出一个振幅方程的字段，使我们能够预测分析集群的元素之间的距离。
英文摘要：
Passively mode-locked vertical external-cavity surface-emitting semiconductor lasers (VECSELs) composed of a gain chip and a semiconductor saturable absorber have been drawing much attention due to their excellent performance figures. In this work we investigate how localized structures and incoherent, non-locally bound, pulse molecules emerge in a long cavity VECSELs using a V-shaped cavity geometry. We show that these states are bistable with the laser off state and that they are individually addressable. Using a model based upon delay differential equations, we demonstrate that pulse clusters result from the cavity geometry and from the non-local coupling with the gain medium; this leads to locally independent, yet globally bound phase, incoherent photonic molecules. Using a multiple time-scale analysis, we derive an amplitude equation for the field that allows us to predict analytically the distance between the elements of a cluster.
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