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arXiv 1709.05239physics.optics
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正弦锥形波导中准相位匹配$χ^{(3)}-$参量相互作用

Quasi-phase-matching $χ^{(3)}-$parametric interactions in sinusoidally-tapered waveguides

Mohammed F. Saleh

摘要:

在这篇文章中,我展示了如何锥形波导可以作为有效的准相位匹配计划的四波混频参量过程中的三阶非线性材料。作为一个例子,已进行了深入的研究,提高三次谐波产生的正弦锥形光纤。利用傅里叶级数分析,得到了这些结构中非线性参量相互作用的准相位匹配条件。研究了三次谐波的转换效率与调制幅度、抽运波长、抽运方向、锥形周期等参量的关系。与均匀波导相比,转换效率提高了几个数量级。我设想这项工作可以重塑领域的引导非线性光学使用中心对称材料。

英文摘要:

In this article, I show how periodically-tapered waveguides can be employed as efficient quasi-phase-matching schemes for four-wave mixing parametric processes in third-order nonlinear materials. As an example, a thorough study of enhancing third-harmonic generation in sinusoidally-tapered fibres has been conducted. The quasi-phase-matching condition has been obtained for nonlinear parametric interactions in these structures using Fourier-series analysis. The dependencies of the conversion efficiency of the third harmonic on the modulation amplitude, tapering period, longitudinal-propagation direction, and pump wavelength have been studied. In comparison to uniform waveguides, the conversion efficiency has been enhanced by orders of magnitudes. I envisage that this work can reshape the field of guided nonlinear optics using centrosymmetric materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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