ABSTRACT

The effect of the temperature on refractive index (RI) sensors based on U and Coil-shaped plastic optical fiber (POF) was investigated. For this purpose, four POF-RI sensor probes were produced, and RI changes caused by ethanol changes in solutions were detected. Two of the produced probes were U-shaped, while the other two were Coil-shaped. For the first time in the literature, the effect of both the geometry of the U and Coil-shaped POF-RI sensors on the sensor parameters and the effect of the medium temperature have been analyzed together. As a result of the experiments conducted at 25°C, the best RI change detection sensitivity, linearity, and resolution values were determined as 821%/RIU, 0.9974 (R²), 5.18 × 10⁻⁴. In addition, temperature dependence loss (TDL) and temperature dependence RI deviation (TDR) were measured at different temperatures (25–40°C) in the 1.3346–1.45 RI range, and the effect of temperature change on POF-RI sensor probes was characterized.

摘要

研究了温度对基于U和线圈形塑料光纤（POF）的折射率（RI）传感器的影响。为此，生产了四个POF-RI传感器探针，并检测了溶液中乙醇变化引起的RI变化。所生产的探头中有两个是U形的，另外两个是线圈形的。在文献中第一次同时分析了U型和线圈形POF-RI传感器的几何形状对传感器参数的影响以及介质温度的影响。在25°C下进行实验的结果是，确定的最佳RI变化检测灵敏度，线性和分辨率值分别为821％/ RIU，0.9974（R ²），5.18×10 ^-4。此外，在1.3346–1.45 RI范围内的不同温度（25–40°C）下测量了温度依赖性损失（TDL）和温度依赖性RI偏差（TDR），温度变化对POF-RI传感器探头的影响为表征。