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<p>We propose a ring core photonic crystal fiber (RC-PCF) which can transmit 274 orbital angular momentum (OAM) modes in the C and L telecommunication bands (1.52&#xa0;µm to 1.61&#xa0;µm). It consists of a chalcogenide ring core (As<sub>2</sub>S<sub>3</sub>) and silica (SiO<sub>2</sub>) cladding. The fiber has a segmented air hole geometry with gradually increasing air holes radii. This design has been numerically investigated using COMSOL Multiphysics. Several key parameters, including mode purity, confinement loss, effective mode area, numerical aperture, and nonlinear coefficient, have been calculated. The fiber exhibited a high mode purity (greater than 95%) for all supported modes and low confinement losses in the range 10<sup>–10</sup>–10<sup>–11</sup>&#xa0;dB/m<i>.</i> The optimized design has produced a high numerical aperture in the range 0.25–0.34 and has a low nonlinear coefficient in the range 0.11–0.20 W⁻<sup>1</sup>&#xa0;km⁻<sup>1</sup> for stable transmission.</p>

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Computational analysis of ring core segmented cladding photonic crystal fiber to study OAM modes in telecommunication band

  • 期刊论文

  • 发表日期：

    2025年12月10日

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  • Aditya Kumar,
  • Akash Khamaru,
  • Deepak Garg,
  • Ajeet Kumar

摘要

We propose a ring core photonic crystal fiber (RC-PCF) which can transmit 274 orbital angular momentum (OAM) modes in the C and L telecommunication bands (1.52 µm to 1.61 µm). It consists of a chalcogenide ring core (As2S3) and silica (SiO2) cladding. The fiber has a segmented air hole geometry with gradually increasing air holes radii. This design has been numerically investigated using COMSOL Multiphysics. Several key parameters, including mode purity, confinement loss, effective mode area, numerical aperture, and nonlinear coefficient, have been calculated. The fiber exhibited a high mode purity (greater than 95%) for all supported modes and low confinement losses in the range 10–10–10–11 dB/m. The optimized design has produced a high numerical aperture in the range 0.25–0.34 and has a low nonlinear coefficient in the range 0.11–0.20 W⁻1 km⁻1 for stable transmission.