在干涉型光纤温度传感器中,可以根据干涉条纹的移动方向和移动量判别外界温度的变化方向和大小。在对传感器的测量精度无极高要求时,通常可以采用增加温度与光纤作用长度和直接对干涉条纹移动量计数的方法得知温度的变化。这种方法有一个很大的优点,就是光波的极化态变化及光源输出强度的变化只会影响条纹的强度和清晰度,不会影响条纹的位 In the interference type optical fiber temperature sensor, the direction and magnitude of change of the outside temperature can be discriminated according to the movement direction and the movement amount of the interference fringes. In the absence of extremely high accuracy of the sensor measurement requirements, the temperature can be generally used to increase the temperature and the length of the fiber and the interference fringe movement directly counting method of temperature changes. One of the great advantages of this method is that the change in the polarization state of the light wave and the change in the output intensity of the light source only affects the intensity and the sharpness of the stripe and does not affect the position of the stripe