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<p>Gases that exist in large quantities in rigs and refineries are methane and hydrogen sulfide. These gases are flammable, toxic, and colorless. The amounts of these two gases can be detected with great accuracy using the photonic crystal fiber sensor. This paper proposes a new hybrid photonic crystal fiber (PCF) with four non-circular holes around the core region and circular rings for hydrogen sulfide sensing at the wavelength of λ = 1.578&#xa0;μm. This PCF has a microstructure core. The numerical results based on the full vector finite element method (FEM) showed that non-circular holes around the core region improve sensitivity. Characteristics of the proposed structure have been investigated by changing the diameter of the holes. Finally, we were able to reach a sensitivity of 79.75% at the wavelength of 1.578&#xa0;μm, at which the H<sub>2</sub>S has a strong absorption line.</p>

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High-sensitive hybrid non-circular photonic crystal fiber for H2S detection

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Amin Molaee Fard,
  • Mohammad Javadian Sarraf,
  • Farzan Khatib,
  • Ebrahim Attaran Kakhki

摘要

Gases that exist in large quantities in rigs and refineries are methane and hydrogen sulfide. These gases are flammable, toxic, and colorless. The amounts of these two gases can be detected with great accuracy using the photonic crystal fiber sensor. This paper proposes a new hybrid photonic crystal fiber (PCF) with four non-circular holes around the core region and circular rings for hydrogen sulfide sensing at the wavelength of λ = 1.578 μm. This PCF has a microstructure core. The numerical results based on the full vector finite element method (FEM) showed that non-circular holes around the core region improve sensitivity. Characteristics of the proposed structure have been investigated by changing the diameter of the holes. Finally, we were able to reach a sensitivity of 79.75% at the wavelength of 1.578 μm, at which the H2S has a strong absorption line.