In this paper, we proposed a highly sensitive temperature sensor based on self-phase modulation (SPM) in an in-house fabricated microstructured optical fiber (MOF) which had three rings of air holes. The temperature sensing performance was evaluated by detecting the 3 dB bandwidth of SPM spectrum with the variation of temperature at different pump wavelengths and average pump power. At the pump wavelength of 1400 nm with the average pump power of 600 mW, the temperature sensitivity was obtained to be as high as 1.296 nm/°C. Moreover, the theoretical simulation was carried out, the results of which corresponded well with the experiment. To the best of our knowledge, this is the first experimental study concerning SPM-based temperature sensing. This work proves experimentally and theoretically a new temperature sensing mechanism drawing on the SPM effect in optical fibers, which is expected to develop temperature sensors of low cost, simple structure and high sensitivity.

中文翻译：

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基于自相位调制效应的微结构光纤温度传感器

在本文中，我们在具有三个气孔环的内部制造的微结构光纤（MOF）中，提出了一种基于自相位调制（SPM）的高灵敏度温度传感器。通过检测SPM频谱的3 dB带宽随不同泵浦波长和平均泵浦功率的温度变化来评估温度感测性能。在泵浦波长为1400 nm，平均泵浦功率为600 mW的情况下，获得的温度灵敏度高达1.296 nm /°C。此外，进行了理论模拟，其结果与实验吻合得很好。据我们所知，这是有关基于SPM的温度感测的第一项实验研究。