摘要
在对光纤背向喇曼散射温度效应理论分析的基础上,研制了基于单模光纤的5km分布式温度传感器。实验比较了温度传感解调方法,选择反斯托克斯(Anti-Stokes)和斯托克斯(Stokes)背向喇曼散射光强度比值进行解调。介绍了系统的硬件组成和软件实现。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2m。
Temperature effect of optical fiber antitropic Raman scattering is analyzed theoretically and distributed tempera- ture sensor based on single-mode fiber is designed. It can detect 5km thermal field. Demodulations of temperature transduction are compared, and the demodulation based on the ratio of Anti-Stokes and Stokes antitropic Raman scattering intensity is selected. Both hardware composition and software implementation of the system is introduced. It is proved in this experiment that it can accurately detect temperature, and its distinguishing ability of temperature and space are 1℃ and 2m separately.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2008年第5期724-727,共4页
Optical Technique
