A systematic analysis of parametric instabilities in nonlinear parabolic multimode fibers
A systematic analysis of parametric instabilities in nonlinear parabolic multimode fibers
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DOI：
10.1063/1.5044659
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发表时间：
2019-02
期刊：
影响因子：
5.6
通讯作者：
H. Lopez-Aviles;Fan O. Wu;Z. S. Eznaveh;M. A. Eftekhar;F. Wise;R. A. Correa;D. Christodoulides
中科院分区：
文献类型：
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作者：
H. Lopez-Aviles;Fan O. Wu;Z. S. Eznaveh;M. A. Eftekhar;F. Wise;R. A. Correa;D. Christodoulides
对非线性渐变折射率多模光纤的几何参数不稳定性进行了系统的分析。我们的方法隐含地考虑了自聚焦效应，并考虑了所有阶数的色散过程。结果表明，所得到的参数问题采用Hill方程的形式，该方程可以用Floquet方法系统地处理。发展的理论表明，随着注入抛物线多模光纤的功率水平的增加，与几何参数不稳定性相关的不稳定谱域可以显著改变。这些预测与从梯度折射率多模结构中收集的实验数据非常一致。
We provide a systematic analysis of geometric parametric instabilities in nonlinear graded-index multimode fibers. Our approach implicitly accounts for self-focusing effects and considers dispersion processes to all orders. It is shown that the resulting parametric problem takes the form of a Hill’s equation that can be systematically addressed using a Floquet approach. The theory developed indicates that the unstable spectral domains associated with such geometric parametric instabilities can be significantly altered as the power levels injected in a parabolic multimode fiber increase. These predictions are in excellent agreement with experimental data gathered from graded-index multimode structures.