基于分布式反馈激光器的温度传感器

Fiber optic temperature sensor has a broad application prospect in the field of temperature sensing. Based on the principle that the resonant wavelength of Bragg grating changes with temperature, a new temperature sensing technique based on distributed feedback (DFB) laser is proposed. The DFB laser in a transistor outline (TO) package is used as a passive component to sense the temperature changing. Experimental results show that the sensor has good reliability, linearity and temperature sensitivity. The temperature sensitivity is up to 0.1031nm/℃, which is 10 times of that of the FBG temperature sensor.