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<p>This study presents a semicircular convex groove bias core photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) for high-precision temperature and refractive index (RI) detection. Finite element method (FEM) simulations demonstrate the PCF-SPR sensor provides a temperature detection range of -25 to 130&#xa0;°C. In this range, the sensor achieves a maximum wavelength sensitivity (WS) of 21.2&#xa0;nm/°C, a maximum figure of merit (FOM) of 0.1182&#xa0;°C⁻¹, and a maximum precision of 4.807 × 10⁻³ °C. Additionally, refractive index (RI) detection results indicate that the PCF-SPR sensor covers an RI range of 1.15 to 1.45, with a maximum WS of 40,100&#xa0;nm/RIU. Therefore, this proposed sensor demonstrates strong potential for temperature monitoring in aerospace cooling systems and cabin environments, as well as for biomolecule detection and drug composition analysis.</p>

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Highly sensitive wide detection range bias core slot photonic crystal fiber-optic temperature and refractive index sensor based on surface plasmon resonance

  • 期刊论文

  • 发表日期：

    2025年6月5日

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  • Honggang Pan,
  • Qingcheng You,
  • Dianyou Song,
  • Zihong Zhao,
  • Yukun Zhu,
  • Yichen Li,
  • Bin Li,
  • Fengjun Xue

摘要

This study presents a semicircular convex groove bias core photonic crystal fiber (PCF) sensor based on surface plasmon resonance (SPR) for high-precision temperature and refractive index (RI) detection. Finite element method (FEM) simulations demonstrate the PCF-SPR sensor provides a temperature detection range of -25 to 130 °C. In this range, the sensor achieves a maximum wavelength sensitivity (WS) of 21.2 nm/°C, a maximum figure of merit (FOM) of 0.1182 °C⁻¹, and a maximum precision of 4.807 × 10⁻³ °C. Additionally, refractive index (RI) detection results indicate that the PCF-SPR sensor covers an RI range of 1.15 to 1.45, with a maximum WS of 40,100 nm/RIU. Therefore, this proposed sensor demonstrates strong potential for temperature monitoring in aerospace cooling systems and cabin environments, as well as for biomolecule detection and drug composition analysis.