Sulaiman Nazrah Ilyana, Ngajikin Nor Hafizah, Che Abd Rashid Nurfatihah, Yaacob Afiqah, Yaacob Maslina, Ibrahim Mohd Haniff, Cholan Noran Azizan
Appl Opt. 2021 May 1;60(13):3895-3900. doi: 10.1364/AO.419801.
A plastic optical fiber (POF) temperature sensor with high sensitivity is experimentally demonstrated in this work. The temperature sensor is realized by a combination of macrobending and an unclad region in the fabrication of its sensor head. The POF sensor is bent into a balloon-like structure in order to introduce the effect of macrobending. For the optimization of the sensor performance, the bending radius of the balloon-like structure is varied. Experimental results suggest that the performance is optimized when the bending radius is fixed at 55 mm. With this amount of bending radius, temperature sensitivity of up to ${22.2} \times {{1}}{{{0}}^{- 3}}^\circ {{\rm{C}}^{- 1}}$ can be achieved in the range from 40°C to 80°C, with linearity of 0.99 and resolution of 0.45°C. This technique is found to improve the POF temperature sensitivity in comparison to previous developments.
本文通过实验展示了一种高灵敏度的塑料光纤（POF）温度传感器。该温度传感器是通过在其传感头制造过程中结合宏弯曲和无包层区域实现的。为引入宏弯曲效应，POF传感器被弯曲成气球状结构。为优化传感器性能，改变了气球状结构的弯曲半径。实验结果表明，当弯曲半径固定为55毫米时性能最佳。在此弯曲半径下，在40°C至80°C范围内可实现高达22.2×10⁻³°C⁻¹的温度灵敏度，线性度为0.99，分辨率为0.45°C。与先前的技术相比，该技术提高了POF温度灵敏度。
