Over two octaves supercontinuum generation in low dispersion square lattice silica photonic crystal fiber

IF 3.2 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI:10.1016/j.aeue.2026.156238

Duc Hoang Trong , Lanh Chu Van , Thuy Nguyen Thi

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引用次数: 0

Abstract

This paper presents a numerical study on the optimization of square lattice silica photonic crystal fibers with variable pitch and a C₂Cl₄-infiltrated core, aiming to achieve tailored dispersion characteristics for efficient mid-infrared supercontinuum generation at 1.55 μm wavelength. The square cladding structure is known as an effective solution for generating smooth, flat-top SCGs, suitable for optical tomography applications. The first fiber has an ultra-flat all-normal dispersion profile with ΔD = ±0.889 ps/nm·km over a wavelength range of 0.352 μm. When pumped with 40 fs pulses at an input energy of 0.12 nJ, this fiber generates supercontinuum spectrum spanning from 0.811 to 2.44 μm (approximately 1.6 octaves), driven primarily by self phase modulation and optical wave breaking. The second fiber provides flat anomalous dispersion (ΔD = ±7.573 ps/nm·km over the same wavelength range as the first fiber), with a low dispersion value of 2.448 ps/nm·km at 1.55 μm. It supports soliton induced supercontinuum with a spectrum covering 0.788 to 3.673 μm (more than two octaves) using a pump pulse of 120 fs duration and an input energy of 0.48 nJ. These optimized fibers demonstrate strong potential for the realization of compact, cost effective supercontinuum generation sources applicable to mid-infrared nonlinear applications.

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低色散方形晶格硅光子晶体光纤中两个倍频超连续谱的产生

为了在1.55 μm波长处实现高效的中红外超连续光谱，本文对变节距、c2cl4包芯的方晶格硅光子晶体光纤进行了优化研究。方形包层结构被认为是一种有效的解决方案，用于生成光滑的平顶scg，适用于光学层析成像应用。第一根光纤在0.352 μm波长范围内具有超平坦的全正常色散曲线ΔD =±0.889 ps/nm·km。当输入能量为0.12 nJ的40fs脉冲泵浦时，该光纤产生了跨度为0.811 ~ 2.44 μm（约1.6倍频）的超连续光谱，主要由自相位调制和光波破缺驱动。第二根光纤提供平坦的异常色散（ΔD =±7.573 ps/nm·km，在与第一根光纤相同的波长范围内），在1.55 μm处色散值较低，为2.448 ps/nm·km。使用持续时间为120 fs、输入能量为0.48 nJ的泵浦脉冲，支持0.788 ~ 3.673 μm（大于两个倍频）的孤子诱导超连续谱。这些优化后的光纤显示了实现适用于中红外非线性应用的紧凑、经济高效的超连续谱产生源的强大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.