Spatial and time characteristics of a four-wave radiation converter in a parabolic waveguide with resonant nonlinearity

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-02-01 DOI:10.18287/2412-6179-co-1199

E. Vorobeva, V. V. Ivakhnik, D. R. Kapizov

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引用次数: 1

Abstract

Spatial and temporal characteristics of a degenerate four-wave converter in a multimode waveguide with resonant nonlinearity in a scheme with counter-pumping waves are analyzed using the time response function and the point spread function. For single-mode pump waves with equal mode numbers, the dependences of the time response width on the waveguide length, the intensity of the first pump waves, and the mode number in the mode expansion of the object wave amplitude are obtained for the four-wave converter. The greatest contribution to the object wave amplitude is shown to be from the waveguide mode whose number coincides with the mode number of single-mode pump waves. For the stationary model, taking into account the spatial structure of the Gaussian pump wave leads to a monotonous decrease with a decrease in the pump beam width, followed by a constant value of the PSF module width. With single-mode pump waves with equal mode numbers, An increase in the mode number of the pump waves leads to a redistribution of energy concentrated in the side maxima of the point signal image and improvement in the quality of the wavefront reversal for a model with single-mode pump waves with equal mode numbers.

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谐振非线性抛物波导中四波辐射变换器的时空特性

利用时间响应函数和点扩展函数分析了非线性共振多模波导中简并四波变换器在反抽运波格式下的时空特性。对于模数相等的单模泵浦波，得到了四波变换器时间响应宽度与波导长度、第一泵浦波强度和目标波幅值模态展开中的模数的关系。对目标波幅值贡献最大的是波导模，其模数与单模泵浦波模数重合。对于平稳模型，考虑高斯泵浦波的空间结构导致随着泵浦束宽度的减小而单调减小，PSF模块宽度随之保持恒定值。对于等模数的单模泵浦波，当泵浦波的模数增加时，能量会重新集中在点信号图像的侧最大值处，从而改善了等模数的单模泵浦波模型的波前反转质量。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.