分析了光纤Bragg光栅的传感原理，将光纤光栅置于细钢管通过一种耐高温胶粘结细钢管两端使光纤光栅在高温下不脱落，并通过细钢管上的中间螺纹给光纤光栅施加预应力，使光纤光栅在温度变化过程中一直保持张紧状态，保证传感器有很好的重复性和良好的线性．实验结果表明：该FBG光纤光栅温度传感器灵敏度为0．0252nm／℃，有良好的重复性和线性，温度测量范围达200℃以上，可应用在高温环境测量温度的变化．

The principle of fiber Bragg grating sensing is analyzed. Fiber Bragg grating(FBG) is placed in a thin metal tube and a special kind of high temperature-resistance pastern felts with two ends of the metal tube to make FBG not to fall off. Tensile force is put on the FBG by the screw thread in the process of encapsulation,which ensures the FBG tightening in changeable temperatures out of environment. It is found that the structure of FBG temperature sensor has good repeatability and linearity. The experimental results show that the temperature response sensitivity is 0.0252 nm/℃,and the response curve is linear,and the whole measuring range is over 200℃ at least. The FBG temperature sensor can be used in high temperature environment.