单模光纤分布式喇曼温度传感系统设计

Design of a single-mode fiber distributed Raman temperature sensor system

文章作者在对光纤背向喇曼散射温度效应进行理论分析的基础上,对基于反斯托克斯/斯托克斯散射光强比值型的光纤分布式喇曼温度传感系统作了详细的研究,对系统主要器件的要求进行了计算,研制了基于单模光纤的5 km分布式温度传感器。实验表明,系统能精确地进行分布式测温,温度分辨率为1℃,空间分辨率为2 m。

On the basis of the theoretical analysis of the temperature effect of fiber Raman backscattering, this paper investigates in detail the fiber distributed temperature sensor system that is based on anti-Stokes/Stokes scattering optical intensity ratio values and develops a single-mode fiber-based 5 km distributed temperature sensor on the basis of analyzing the requirements of the main devices of the system. The experimental results show that this system can make accurate distributed temperature detection with a temperature resolution ratio of 1℃ and a spatial resolution ratio of 2 m.