Rapid technology development and various applications show great demands for high-quality temperature sensors with super-sensitivity, broad working temperature ranges, excellent linearity and high stability. Although tremendous efforts have been dedicated towards developing fiber sensors with high performance, challenges still remain in achieving all of the four parameters. Herein, we fabricate a fiber sensor via a Mach-Zehnder interferometer (MZI) combined with a liquid crystal (LC)-filled microtube, where the LC in the microtube is uniformly orientated. The LCs with uniform orientation treatment play a vital role in the fiber sensor. The feasibility of this sensor was verified by theoretical simulation and demonstrated through experiments. The fabricated LC fiber sensor has super temperature sensitivity of -21.6 nm/°C with a good linearity of 0.976 from 22°C to 31°C, -558.5 nm/°C from 31°C to 32°C, -37.3 nm/°C with a good linearity of 0.999 from 32°C to 34°C and -6.7 nm/°C with a good linearity of 0.999 from 34°C to 110°C, respectively. The sensitivity of the fiber sensor is increased by up to 155 times, compared to the previously reported fiber sensor filled with LC based on the MZI without LC orientation treatment. The fiber sensor with super-sensitivity, broad working temperature range, excellent linearity and high stability provides great potential applications in such as environment monitoring, food detection, medicine, and chemical industry.

中文翻译：

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基于Mach-Zehnder干涉仪的高性能光纤传感器，基于将裸露的纤芯微结构光纤浸入定向液晶中。

快速的技术发展和各种应用对具有超灵敏性，宽工作温度范围，出色的线性度和高稳定性的高质量温度传感器提出了很高的要求。尽管已致力于开发高性能的光纤传感器，但是在实现所有四个参数方面仍然存在挑战。在本文中，我们通过马赫曾德尔干涉仪（MZI）与填充了液晶（LC）的微管相结合来制造光纤传感器，其中微管中的LC方向均匀。具有均匀取向处理的LC在光纤传感器中起着至关重要的作用。通过理论仿真验证了该传感器的可行性，并通过实验进行了验证。制成的LC光纤传感器具有-21.6 nm /°C的超高温灵敏度，且线性度为0。从22°C到31°C为976，从31°C到32°C为-558.5 nm /°C，-37.3 nm /°C在32°C至34°C和-6.7 nm / °C，从34°C到110°C的线性良好，分别为0.999。与之前报道的基于LC的MZI的LC光纤传感器相比，光纤传感器的灵敏度提高了155倍。光纤传感器具有超高灵敏度，宽工作温度范围，出色的线性度和高稳定性，在环境监测，食品检测，医药和化学工业等领域具有巨大的潜在应用。与之前报道的基于LC的MZI的LC光纤传感器相比，光纤传感器的灵敏度提高了155倍。光纤传感器具有超高灵敏度，宽工作温度范围，出色的线性度和高稳定性，在环境监测，食品检测，医药和化学工业等领域具有广阔的应用前景。与之前报道的基于LC的MZI的LC光纤传感器相比，光纤传感器的灵敏度提高了155倍。光纤传感器具有超高灵敏度，宽工作温度范围，出色的线性度和高稳定性，在环境监测，食品检测，医药和化学工业等领域具有广阔的应用前景。