Simulation of Ultra-Short Laser Pulses Propagation and Ionization in Dual-Gas-Cells to Enhance the Quasi-Phase Matching of Harmonics Generation in Plasmas

IF 0.5 Q4 MULTIDISCIPLINARY SCIENCES

Journal of Mathematical and Fundamental Sciences Pub Date : 2024-07-11 DOI:10.5614/j.math.fund.sci.2024.55.3.4

W. Adress

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引用次数: 0

Abstract

A numerical model was designed and implemented to investigate the influence of plasma defocusing on laser characteristics. The effects of plasma defocusing were investigated by studying beam divergence, intensity reduction, and blue shifting. The diffusion of the ultra-intense laser beam in gas cells was within a Rayleigh range. Moreover, using dual-gas-cells, the impact of quasi-phase matching (QPM) on the creation of harmonic pulses in argon and hydrogen plasmas was studied. The alternating structure of argon and hydrogen gas cells showed a perfect build-up of the generated ultra-short harmonics pulses. The impact of electron density on laser diffusion and the creation of harmonic pulses were also investigated in this work. In the simulation, argon plasma with different plasma densities was used in an alternating structure to create dual-gas-cells and quasi-phase-matching. Noticeable conversion of the fundamental laser pulses to harmonics pulses was accomplished in the model by using the QPM concept.

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模拟超短激光脉冲在双气体池中的传播和电离，增强等离子体中谐波产生的准相位匹配

为研究等离子体散焦对激光特性的影响，设计并实施了一个数值模型。通过研究光束发散、强度降低和蓝移，研究了等离子体散焦的影响。超强激光束在气体室中的扩散在瑞利范围内。此外，还利用双气体池研究了准相位匹配（QPM）对在氩气和氢气等离子体中产生谐波脉冲的影响。氩气池和氢气池的交替结构显示了所产生的超短谐波脉冲的完美积累。这项工作还研究了电子密度对激光扩散和谐波脉冲产生的影响。在模拟中，不同等离子体密度的氩等离子体被用于交替结构中，以创建双气体电池和准相位匹配。通过使用 QPM 概念，在模型中实现了基本激光脉冲到谐波脉冲的显著转换。

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来源期刊

Journal of Mathematical and Fundamental Sciences MULTIDISCIPLINARY SCIENCES-

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

24 weeks

期刊介绍： Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health Sciences, Medical Sciences, Pharmacy), Mathematics, Physics, and Statistics. New submissions of mathematics articles starting in January 2020 are required to focus on applied mathematics with real relevance to the field of natural sciences. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.