Opt Express. 2021 Apr 26;29(9):12930-12940. doi: 10.1364/OE.423307.
The accuracy of the surface plasmon resonance (SPR) optical fiber sensor is affected by the change of ambient temperature. Therefore, we propose a simple dual channel SPR optical fiber sensor, which can measure both glucose concentration and ambient temperature. The proposed sensor is a two-channel structure based on a no-core optical fiber (NCF): one channel is coated with gold film and polydimethylsiloxane (PDMS) to sense the ambient temperature, and the other is coated with silver film to sense glucose concentration. The experimental results show that the sensor's sensitivity for sensing glucose concentration is 2.882 nm / %, and for sensing temperature is -2.904 nm / °C. By monitoring the real-time temperature, the accuracy of glucose concentration detection was improved. The proposed sensor has a simple and compact structure, and it is suitable for sensing glucose solution or other analyte solutions that need temperature compensation.
表面等离子体共振（SPR）光纤传感器的精度受环境温度变化的影响。因此，我们提出了一种简单的双通道 SPR 光纤传感器，它可以同时测量葡萄糖浓度和环境温度。所提出的传感器是一种基于无芯光纤（NCF）的双通道结构：一个通道涂有金膜和聚二甲基硅氧烷（PDMS）以感测环境温度，另一个通道涂有银膜以感测葡萄糖浓度。实验结果表明，该传感器检测葡萄糖浓度的灵敏度为 2.882nm/%，检测温度的灵敏度为-2.904nm/°C。通过实时监测温度，提高了葡萄糖浓度检测的准确性。所提出的传感器具有结构简单、紧凑的特点，适用于感测需要温度补偿的葡萄糖溶液或其他分析物溶液。
