Scholarlink

<p>A solid-core photonic crystal fiber (PCF) based on Ge₃₃As₁₂Se₅₅ (GAS) chalcogenide glass is proposed for mid-infrared supercontinuum generation. In the proposed design, GAS forms both the core and the background material, while periodic air holes in the cladding create the refractive-index contrast required for optical confinement and dispersion engineering. By optimizing the structural parameters of the PCF, a nearly flat all-normal dispersion profile is achieved with a dispersion value of − 10.24 ps/nm/km at the pump wavelength of 5700&#xa0;nm. At this wavelength, the fiber exhibits an effective mode area of 12.32&#xa0;μm<sup>2</sup> and a high nonlinear coefficient of approximately 700&#xa0;Ws km<sup>−1</sup>. Numerical simulations based on the generalized nonlinear Schrödinger equation show that efficient spectral broadening can be achieved using a 100&#xa0;fs pulse with a peak power of 0.9&#xa0;kW propagating through a 10&#xa0;mm fiber. The resulting supercontinuum spans approximately from 1&#xa0;μm to 14&#xa0;μm, with the majority of spectral power concentrated near the pump region. The combination of high nonlinearity, engineered dispersion, and short fiber length enables efficient mid-infrared spectral broadening, indicating the potential of the proposed PCF for applications in spectroscopy, optical coherence tomography, gas sensing, and mid-infrared photonics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Optimizing supercontinuum generation spanning mid-infrared region in a solid core Ge₃₃As₁₂Se55 (GAS) photonics crystal fiber: design and simulation insights

  • 期刊论文

  • 发表日期：

    2026年4月12日

查看全文
  • Yusuf Garba Yusuf,
  • Preeti Rani,
  • Venus Dillu

摘要

A solid-core photonic crystal fiber (PCF) based on Ge₃₃As₁₂Se₅₅ (GAS) chalcogenide glass is proposed for mid-infrared supercontinuum generation. In the proposed design, GAS forms both the core and the background material, while periodic air holes in the cladding create the refractive-index contrast required for optical confinement and dispersion engineering. By optimizing the structural parameters of the PCF, a nearly flat all-normal dispersion profile is achieved with a dispersion value of − 10.24 ps/nm/km at the pump wavelength of 5700 nm. At this wavelength, the fiber exhibits an effective mode area of 12.32 μm2 and a high nonlinear coefficient of approximately 700 Ws km−1. Numerical simulations based on the generalized nonlinear Schrödinger equation show that efficient spectral broadening can be achieved using a 100 fs pulse with a peak power of 0.9 kW propagating through a 10 mm fiber. The resulting supercontinuum spans approximately from 1 μm to 14 μm, with the majority of spectral power concentrated near the pump region. The combination of high nonlinearity, engineered dispersion, and short fiber length enables efficient mid-infrared spectral broadening, indicating the potential of the proposed PCF for applications in spectroscopy, optical coherence tomography, gas sensing, and mid-infrared photonics.