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Terahertz polymer vortex photonic crystal fiber with low confinement loss and flat dispersion for stable transmission of 92 orbital angular momentum modes

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Abstract

In this paper, we propose a novel polymer circular photonic crystal fiber (C-PCF) with a composite cladding structure that can support 92 terahertz (THz) orbital angular momentum (OAM) modes in the 1.5–3.5 THz frequency range. The difference in effective refractive index between the corresponding HE and EH modes is more than 10\(^{-3}\). At 2.5 THz, the confinement losses of most vector modes are less than 10\(^{-10 }\)dB/cm, and the smallest dispersion variation is 0.0487 ps/THz/cm. All vector modes have effective mode areas greater than \(4 \times 10^{-7} \mathrm {~m}^2\). Furthermore, the fiber’s mode purity is greater than 96% over 2.3–3.5 THz. All of these properties indicate that this fiber has a larger potential for application in the next generation of terahertz multimode communication.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. Institute of Fiber Optics, Shanghai University, Shanghai, 201800, China

    Hao Chang & Yichao Meng

  2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai, 200072, China

    Hao Chang & Yichao Meng

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  1. Hao Chang
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  2. Yichao Meng
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Correspondence to Yichao Meng.

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Chang, H., Meng, Y. Terahertz polymer vortex photonic crystal fiber with low confinement loss and flat dispersion for stable transmission of 92 orbital angular momentum modes. Opt Quant Electron 56, 267 (2024). https://doi.org/10.1007/s11082-023-05873-8

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