飞秒激光耐高温光纤光栅传感器的制备

针对传统光纤光栅传感器由于折射率调制量导致温度稳定性差的缺点，利用了飞秒激光诱导折射率变化的机理制备了一种耐高温的光纤光栅温度传感器. 首先采用800 nm飞秒激光结合相位掩膜板法在标准通信光纤上写制了光纤布拉格光栅传感器，然后通过高温退火实验对该传感器在900 ℃下的温度稳定性进行了测量，最后采用线性拟合的方法得到了传感器的温度灵敏度系数. 实验结果表明，该传感器在900 ℃下具有较好的温度稳定性，在温度为100 ℃到900 ℃范围内温度灵敏度系数达到1.27×10-11 m/℃.

Fabrication of High-Temperature-Resistant Fiber Grating Sensor by Femtosecond Laser

Aimed at the poor temperature stability of traditional fiber grating sensors， a heatresistant fiber bragg grating （FBG） sensor was fabricated by the femtosecond laser based on the mechanism of induced refractive index change. Firstly， the 800nm femtosecond laser combined with the phase mask plate method was adopted to write FBG sensors in the standard telecommunication fiber. Then the temperature stability of the sensor was measured by the high temperature annealing experiment under 900℃. Finally， the temperature sensitivity of the sensor was obtained by using linear fitting. The experimental results show that the sensor has a very high temperature stability under 900 ℃， and the sensitivity coefficient can achieve 1.27×10-11 m/℃ in the range of 100 -900 ℃.