发表机构
Gleb Wataghin Institute of Physics, University of Campinas – UNICAMP; GPPMM Group, XLIM Institute, CNRS UMR 7252, University of Limoges; Multiuser Laboratory of Optics and Photonics, LaMOF, Federal University of Lavras（坎皮纳斯大学 Gleb Wataghin 物理研究所; 利摩日大学 XLIM 研究所 GPPMM 研究组; 拉夫拉斯联邦大学 LaMOF 光学与光子学多用户实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对填充氙气的负曲率光纤，通过半解析模型与数值模拟优化级联四波混频，实现延伸至真空紫外的谐波产生，最高达172 nm的六次谐波。
AI 中文摘要
本工作中，我们对在压力梯度下运行的填充氙气的负曲率空芯光纤中通过级联四波混频产生的三次谐波和四次谐波进行了全面表征。实验结果得到半解析模型和数值模拟的支持，这些模型和模拟准确再现了谐波转换的压力依赖性。我们确定了三次和四次谐波产生的最佳压力条件，实验观察到级联四波混频过程延伸至真空紫外（VUV），最高可达172 nm的六次谐波，可及光谱范围受可用VUV滤光片限制。
英文摘要
In this work, we thoroughly characterize third- and fourth-harmonic generation through cascaded four-wave mixing in a xenon-filled negative-curvature hollow-core fiber operated under a pressure gradient. The experimental results are supported by both a semi-analytical model and numerical simulations, which accurately reproduce the pressure dependence of the harmonic conversion. We identify the optimum pressure conditions for third and fourth-harmonic generation and experimentally observe the cascaded four-wave-mixing process extending into the vacuum ultraviolet (VUV), up to the sixth harmonic at 172 nm, with the accessible spectral range limited by the available VUV filter.
Comments13 pages, 7 figures
