分布式光纤温度传感器

论述了喇曼散射与布里渊散射光纤温度传感器的频域分析方法，该方法克服了传统时域法在信号检测中需要高速采样电路的缺点，为提高传感器空间分辨率开辟了新的途径，讨论了一种基于模耦合原理的高空间分辨率分布式温度传感器，并对喇曼散射、布里渊散射和模耦合效应三种传感器的特点进行了比较。
关 键 词 分布式温度传感; 喇曼散射; 布里渊散射; 模耦合

Abstract The principle of distributed optical-fiber temperature sensor, based on Raman scatter and Brillouin scatter , is discussed by this paper , which adopts the frequency analytical method. The analytical method can overcome the shortcoming of the traditional temporal analytical method, which needs high-speed sample circuit. Furthermore the analytical method has broke a new path to enhance the spatial resolution of sensors. At the same time , a high spatial resolution optical-fiber sensor based on model coupling is discussed by this paper. Finally the comparison of several optical-fiber sensors are presented.
Key words distributed temperature sensor; Raman scatter; Brillouin scatter; mode couping