In this work, all fiber temperature measurement based on change of light polarization is demonstrated using tapered fiber coated with graphene. The large evanescent field of tapered fiber allows graphene to absorb the surrounding heat and subsequently this changes the refractive index of graphene coated tapered fiber. The change of refractive index is due to thermo‐optic effect. When there is a change in surrounding temperature, refractive index of the coated tapered fiber changes and this subsequently modifies the injected light polarization. The proposed temperature sensor can measure temperature up to 250°C and its sensitivity is ascertained at 0.48°/°C. The proposed temperature sensor is beneficial for future Internet of Things (IoT) applications.

中文翻译：

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基于光偏振测量的全光纤温度传感器，使用石墨烯涂层的锥形光纤

在这项工作中，使用涂有石墨烯的锥形光纤演示了基于光偏振变化的所有光纤温度测量。锥形纤维的大渐逝场使石墨烯吸收周围的热量，随后改变了石墨烯包覆的锥形纤维的折射率。折射率的变化归因于热光效应。当周围温度发生变化时，包覆的锥形纤维的折射率会发生变化，从而改变注入的光偏振。提出的温度传感器可以测量高达250°C的温度，其灵敏度确定为0.48°/°C。拟议的温度传感器对未来的物联网（IoT）应用很有帮助。