该文介绍了一种基于马赫-则德尔干涉仪(MZI）与二甲基硅油(DSO)相结合的高灵敏度光纤温度传感器。传感器由MZI及填充在其表面的DSO组成。MZI由单模光纤-锥形无芯光纤-单模光纤构成。填充DSO后，MZI的谐振峰向右有小的漂移。通过跟踪MZI谐振峰波长随温度的变化，对环境温度进行测量。经测试，传感器的温度灵敏度为-97.7 pm/℃，而未填充DSO的MZI温度灵敏度为-50.1 pm/℃，传感器灵敏度提高了约1.95倍。该传感器具有结构制作简单，造价低及灵敏度高等优点，具有一定的应用前景。

A high sensitivity optical fiber temperature sensor based on Mach-Zehnder interferometer(MZI) and dimethyl silicone oil(DSO) is introduced in this paper. The sensor consists of MZI and DSO filled on its surface. The MZI consists of single-mode fiber-tapered no-core fiber-single-mode fiber. After the DSO is filled, the resonant peak of MZI shifts a little to the right. The ambient temperature is measured by tracking the change of MZI resonant peak wavelength with temperature. The temperature sensitivity of the sensor is -97.7 pm/℃, while the temperature sensitivity of MZI without DSO is -50.1 pm/℃. The sensitivity of the sensor is increased by about 1.95 times. The sensor has the advantages of simple structure, easy fabrication, low cost and high sensitivity, and has a certain application prospects.