Spatial Resolution Enhancement of the Brillouin System Based on the Second-order Partial Differential

摘要：

A Brillouin scattering-based distributed optical fiber temperature sensing system was built, using the double-pass Mach-Zehnder interferometer to separate the spontaneous Brillouin scattering from the Rayleigh scattering. The temperature sensing experiment was carried out on a dispersion shift fiber, which is 4.25 km long. The Brillouin scattering signals intensity changes due to the temperature variation on the fiber were measured. For locating the boundary of different temperature regions precisely, the second-order partial differential of the signal with respect to position was done. The processed signal showed a maximum or minimum at the boundary. Knowing the boundaries, we then fit the Brillouin spectrum at the middle between them to get the temperature value, and the spatial resolution was improved.

关键词： second-order partial differential Brillouin scattering distributed temperature measurement

作者: Lijuan ZHAO

作者单位: National Engineering Laboratory for Biomass Power Generation Equipment,North China Electric Power University,Baoding,China

会议类型: 国际会议

会议名称: The Third International Conference on Modelling and Simulation(第三届国际建模、计算、仿真、优化及其应用学术会议 ICMS 2010)

会议地点: 无锡

会议语种:英文

页码: 365-368

在线出版日期: 2010-06-04（万方平台首次上网日期，不代表论文的发表时间）