方晶格 As2S3 卤化物光子晶体光纤中的超宽带中红外超连续发生

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik Pub Date : 2024-11-08 DOI:10.1016/j.ijleo.2024.172113

Ben Chu Van , Trong Dang Van , Lan Phan Thi , Lanh Chu Van

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引用次数: 0

摘要

本研究介绍了一种用于在中红外光谱区产生高相干超连续光的铬化玻璃光子晶体光纤的数值模型。基于有限元法进行了数值模拟。我们采用了光色散工程技术，通过改变所设计光纤的几何参数，将泵浦波长处的色散效应降至最低。我们从模拟结果中选择了两种最佳结构来分析非线性特性和超连续产生。第一种光纤 #F1 的晶格常数为 1.0 μm，填充因子为 0.3，在全常色散状态下工作，提供 2.4 μm 至 8.0 μm 范围内的光谱 SC，泵浦波长为 5.0 µm，脉冲持续时间为 90 fs，峰值功率为 6 kW。同时，#F2 光纤具有异常色散状态。在峰值功率为 2 kW 的情况下，该光纤可产生光谱范围为 4.4-16 μm 的宽 SCG。所提出的结构有望应用于低峰值功率全光纤系统。

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Ultra-broadband mid-infrared supercontinuum generation in square lattice As2S3 chalcogenide photonic crystal fibers

This work presents a numerical model of a photonic crystal fiber made up of chalcogenide glass for highly coherent supercontinuum generation in the mid-infrared spectral region. Numerical simulations based on the finite element method have been performed. An optical dispersion engineering technique has been adopted to minimize the dispersion effect at pump wavelength by alteration of geometrical parameters of designed fiber. We have selected two optimal structures from the simulation results to analyze the nonlinear characteristics and supercontinuum generation. The first fiber, #F₁ with a lattice constant of 1.0 μm and a filling factor of 0.3 operates in all-normal dispersion, providing the spectrum SC in the range of 2.4 μm to 8.0 μm with a pump wavelength of 5.0 µm, pulse duration of 90 fs, and peak power of 6 kW. Meanwhile, fiber #F₂ has anomalous dispersion regimes. With a peak power of 2 kW, this fiber produces a wide SCG with spectral ranges of 4.4–16 μm. The proposed structures are promising for applications in low-peak power all-fiber optical systems.

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来源期刊

Optik 物理-光学

CiteScore

6.90

自引率

12.90%

发文量

1471

审稿时长

46 days

期刊介绍： Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields: Optics: -Optics design, geometrical and beam optics, wave optics- Optical and micro-optical components, diffractive optics, devices and systems- Photoelectric and optoelectronic devices- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis- Optical testing and measuring techniques- Optical communication and computing- Physiological optics- As well as other related topics.