Interplay of excitability and spatial effects in vertical-cavity surface-emitting optical amplifiers

垂直腔表面发射光放大器中兴奋性和空间效应的相互作用

• 批准号: 12939216
• 负责人: Dr. Markus Sondermann
• 金额: --
• 依托单位: Institut Mediterrani dEstudis Avançats
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/12939216?language=en
• 关键词: Interplay; excitability; spatial; effects; vertical

Spatio-temporal phenomena are observed in many natural systems as well as in laboratory experiments. An effect that is often observed in chemical and biological systems is the interplay of spatial degrees of freedom and excitability, a concept that describes the perturbation-independent response of a system once the perturbation amplitude has surpassed a certain threshold level. Only very recently the existence of excitable waves that travel in the direction orthogonal to the propagation of the emitted light has been demonstrated in a semiconductor optical amplifier, i.e., a semiconductor laser that is operated below its lasing threshold and optically injected by a master laser. Semiconductor lasers and optical amplifiers are devices of high technological relevance as well as paradigms of non-linear dynamical systems in optics. Therefore, it is the aim of this project to explore what different kinds of excitable waves do exist in these devices and to characterize their spatial and temporal dynamics, including the interaction of several of the excitable waves. These waves might prove to be useful in possible concepts of all optical communication. Moreover similarities and differences of excitable spatial waves in semiconductor optical amplifiers and other media are to be highlighted. For example, new possibilities in the interaction behaviour of excitable waves in semiconductor optical amplifiers were predicted theoretically. Thus, the understanding of excitable spatial structures in general is hoped to be enriched.

在许多自然系统中以及在实验室实验中都观察到了时空现象。在化学和生物系统中经常观察到的一个效应是空间自由度和兴奋性的相互作用，这是一个概念，描述了一旦扰动幅度超过某个阈值水平，系统的与扰动无关的反应。直到最近，才在半导体光放大器中证明了在与发射光的传播方向垂直的方向上传播的可激发波的存在，即，工作在其激光阈值以下并由主激光器光学注入的半导体激光器。半导体激光器和光学放大器是具有高度技术相关性的器件，也是光学中非线性动力系统的范例。因此，本项目的目的是探索这些设备中确实存在哪些不同类型的可激发波，并表征它们的空间和时间动力学，包括几种可激发波的相互作用。这些波可能在全光通信的可能概念中被证明是有用的。此外，半导体光放大器和其他介质中的可激发空间波的异同也将被强调。例如，从理论上预测了半导体光放大器中可激发波相互作用行为的新可能性。因此，对可激发空间结构的总体理解有望得到丰富。