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arXiv 1611.08950physics.optics
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标量调制不稳定性的几何观

A geometrical view of scalar modulation instability

S. M. Hernandez, P. I. Fierens, J. Bonetti, A. D. Sánchez, D. F. Grosz

摘要:

提出了一种新的标量调制不稳定性(MI)的完整模型的分析方法,通过一个简单的几何描述的功率与频率平面。该公式允许将MI增益的形状与介质的任意色散分布相关联。其结果是,我们得到了一个简单的解释的非平凡的高阶色散的截止功率的依赖性,并明确获得的功率,最大化的增益。我们的方法提出了一个强大的工具来合成一个所需的MI增益与潜在的应用程序,以大量的参数放大和超连续产生设备,其功能依赖于调制不稳定性。

英文摘要:

We present a novel approach to the analysis of a full model of scalar modulation instability (MI) by means of a simple geometrical description in the power vs. frequency plane. This formulation allows to relate the shape of the MI gain to any arbitrary dispersion profile of the medium. As a result, we derive a straightforward explanation of the non-trivial dependence of the cutoff power on high-order dispersion and obtain explicitly the power that maximizes the gain. Our approach puts forth a powerful tool to synthesize a desired MI gain with the potential application to a vast number of parametric-amplification and supercontinuum-generation devices whose functioning relies upon modulation instability.

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