弱非局域非线性对抛物线定律光纤中调制不稳定性和无啁啾孤子束的影响

Q3 Physics and Astronomy
Nkeh Oma Nfor
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引用次数: 0

摘要

本研究探讨了在弱非局部非线性影响下,聚焦立方-五次元非线性光纤介质(利用实验参数)中无啁啾孤子列车的产生和演化。对调制不稳定性(MI)的分析表明,调制不稳定性增益只存在于反常色散机制中,而五次方非线性项会增加最大增益和边带频率。非局部非线性参数通常会抑制 MI 的影响,因为随着非局部性的增加,最大增益会大大降低。通过使用附属常微分方程方法,可以得到静止的周期性孤子序列;随着非局部性的逐渐增加,光束强度会大大降低,频率会增加。然而,非局部性的增加反而降低了行进光信号的频率;这是通过一种有效的变换方法得出的。我们的研究结果有力地表明,非局部非线性在激光光束控制方面具有潜在的应用价值,因为非线性周期性光信号可以很容易地转换成非常微弱的准平面波。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of weak nonlocal nonlinearity on modulational instability and chirp-free soliton trains in parabolic law optical fiber

This study considers the generation and evolution of chirp-free soliton trains in a focusing cubic-quintic nonlinear optical fiber media (by utilizing experimental parameters), under the influence of weak nonlocal nonlinearity. Analysis of modulational instability (MI) reveals that the MI gain exist only in the anomalous dispersion regime, with the quintic nonlinear term increasing the maximum gain and sideband frequencies. The nonlocal nonlinearity parameter generally suppresses the impact of MI, because the maximum gain is greatly reduced with increase in nonlocality. By using the subsidiary ordinary differential equation method, stationary periodic soliton trains are obtained; with the intensity of the optical beam greatly reduced and frequency increased as nonlocality is gradually stepped up. However, an increase in nonlocality instead reduces the frequency of the traveling optical signals; derived via an efficient transformation method. Our results strongly suggest that nonlocal nonlinearity has potential applications in the control of laser beams; as nonlinear periodic optical signals can be easily transformed to very weak quasi-plane waves.

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来源期刊
Results in Optics
Results in Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
2.50
自引率
0.00%
发文量
115
审稿时长
71 days
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