设计了一种新型微结构光纤光栅温度传感器。利用飞秒激光在光纤光栅(FBG)包层部分加工微结构,在含微结构的包层部分镀温度敏感膜,并通过实验对传感器的灵敏度等特性进行了测试。结果表明,传感器具有较好的线性度和可重复性,双螺纹微结构的光纤光栅的温度灵敏度可达30pm/℃,是传统光纤光栅灵敏度的3~4倍,有利于扩展其工程应用范围。 A novel microstructure fiber grating temperature sensor is designed. The femtosecond laser was used to fabricate the microstructure in the FBG cladding layer. The temperature sensitive film was coated on the microstructure-containing cladding layer and the sensitivity of the sensor was experimentally tested. The results show that the sensor has good linearity and repeatability. The temperature sensitivity of the dual-threaded microstructures can reach 30 pm / ° C, which is 3 to 4 times the sensitivity of traditional fiber gratings, which is beneficial to extend its engineering application range.