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<p>A novel circular photonic crystal fiber (C-PCF) was specifically engineered to facilitate the transmission of orbital angular momentum (OAM) modes, accommodating topological charges up to 12. The C-PCF was designed including a ring core made of silica and the cladding comprises an arrangement of air holes within the silica background. The characteristics of optical dissemination were analyzed and simulated using Finite-Difference Eigen-mode (FDE) solver. Furthermore, a perfectly match layer (PML) was used to increase the precision of the analysis result. All of the realized OAM modes generated by C-PCF have a rather flat dispersion, and the loss of most eigen-modes is low, below 0.0026 dB/cm. A small difference of approximately 0.001 was observed in the eigen-mode effective indices, which prevents mode degeneracy and ensures stability during OAM mode transmission. The introduced-PCF in this work shows promise as a potential choice for transmitting OAM modes at a wavelength of 1.55&#xa0;μm that is in demand for increasing capacity in optical communication systems, terabit data transmission and micromanipulation tasks.</p>

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Designing of a Circular Photonic Crystal Fiber to Support Higher-Order Orbital Angular Momentum Modes for Telecommunication Applications

  • 期刊论文

  • 发表日期：

    2025年9月17日

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  • Saba Mirzaee,
  • Mahdi Bahadoran,
  • Hassan Pakarzadeh

摘要

A novel circular photonic crystal fiber (C-PCF) was specifically engineered to facilitate the transmission of orbital angular momentum (OAM) modes, accommodating topological charges up to 12. The C-PCF was designed including a ring core made of silica and the cladding comprises an arrangement of air holes within the silica background. The characteristics of optical dissemination were analyzed and simulated using Finite-Difference Eigen-mode (FDE) solver. Furthermore, a perfectly match layer (PML) was used to increase the precision of the analysis result. All of the realized OAM modes generated by C-PCF have a rather flat dispersion, and the loss of most eigen-modes is low, below 0.0026 dB/cm. A small difference of approximately 0.001 was observed in the eigen-mode effective indices, which prevents mode degeneracy and ensures stability during OAM mode transmission. The introduced-PCF in this work shows promise as a potential choice for transmitting OAM modes at a wavelength of 1.55 μm that is in demand for increasing capacity in optical communication systems, terabit data transmission and micromanipulation tasks.