Cheng Tonglei, Chen Xiaoyu, Gao Yuanhongliu, Zhang Fan, Li Bin, Yan Xin, Zhang Xuenan, Wang Fang, Suzuki Takenobu, Ohishi Yasutake
Opt Lett. 2022 Feb 15;47(4):874-877. doi: 10.1364/OL.449945.
In this paper, the self-phase modulation (SPM) effect in a double-cladding single-mode tellurite optical fiber (DC-SMTOF) was exploited for temperature sensing. The DC-SMTOF was fabricated based on a TeO-ZnO-LiO-BiO (TZLB) glass material that has a thermo-optical coefficient as high as -16.4×10/°C. The temperature sensing performance was evaluated by detecting the 3-dB bandwidth of the SPM spectra with the variation of temperature at different pump wavelength and different average pump power. The temperature sensitivity was obtained to be -2.971 nm/°C with a resolution of 0.0168°C. Both simulation and experiment confirmed that a longer pump wavelength and higher average pump power will result in a higher temperature sensitivity. To the best of our knowledge, this is the first study concerning SPM-based temperature sensing in a tellurite optical fiber. The proposed temperature sensor has a compact structure, and it can realize temperature sensing of high sensitivity without any fiber modification. This work opens the road toward explorations of a novel temperature sensing technology combined with soft glass fibers and nonlinear phenomenon, and is expected to deepen our understanding in the application of these complex nonlinear phenomena.
在本文中，双包层单模碲酸盐光纤（DC-SMTOF）中的自相位调制（SPM）效应被用于温度传感。DC-SMTOF是基于一种碲酸盐-氧化锌-氧化锂-氧化铋（TeO-ZnO-LiO-BiO，TZLB）玻璃材料制成的，该材料具有高达-16.4×10⁻⁶/°C的热光系数。通过在不同泵浦波长和不同平均泵浦功率下，随着温度变化检测SPM光谱的3dB带宽来评估温度传感性能。获得的温度灵敏度为-2.971 nm/°C，分辨率为0.0168°C。仿真和实验均证实，较长的泵浦波长和较高的平均泵浦功率将导致更高的温度灵敏度。据我们所知，这是关于碲酸盐光纤中基于SPM的温度传感的首次研究。所提出的温度传感器结构紧凑，无需对光纤进行任何改性即可实现高灵敏度的温度传感。这项工作为探索结合软玻璃光纤和非线性现象的新型温度传感技术开辟了道路，并有望加深我们对这些复杂非线性现象应用的理解。
