A surface plasmon resonance fiber sensor on the basis of hollow silica capillary (HSC) is theoretically proposed and experimentally demonstrated. Numerical analysis indicates that the structure of multimode–capillary–multimode fiber (MMF–HSC–MMF) possesses high spectral resolution and sensitivity due to the existence of capillary stomata. A 55-nm-thick gold-coated HSC is experimentally implemented, with an average refractive index (RI) sensitivity of 6352.16 nm/RIU in RI range of 1.396–1.423. Taking advantage of high thermal coefficient of PDMS, the gold-coated section thoroughly covered with PDMS is especially sensitive to temperature changes. When monitoring the temperature variations of 5–80 °C, the sensor shows high sensitivity (− 2.067 nm/°C) and high linearity (R2 = 0.9981).

中文翻译：

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使用嵌入聚合物中的 HSC-SPR 建立的紧凑且高灵敏度的温度传感器

理论上提出并实验证明了一种基于空心二氧化硅毛细管（HSC）的表面等离子体共振光纤传感器。数值分析表明，由于毛细管气孔的存在，多模-毛细管-多模光纤（MMF-HSC-MMF）的结构具有较高的光谱分辨率和灵敏度。实验实施了 55 nm 厚的镀金 HSC，其平均折射率 (RI) 灵敏度为 6352.16 nm/RIU，RI 范围为 1.396–1.423。利用PDMS的高热系数，完全覆盖PDMS的镀金部分对温度变化特别敏感。在监测 5–80 °C 的温度变化时，传感器显示出高灵敏度 (− 2.067 nm/°C) 和高线性度 (R2 = 0.9981)。