Cui Qingsong, Pamukcu Sibel, Xiao Wen, Guintrand Cyril, Toulouse Jean, Pervizpour Mesut
School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100083, China.
Appl Opt. 2009 Oct 20;48(30):5823-8. doi: 10.1364/AO.48.005823.
In recent years, several distributed sensor systems based on stimulated Brillouin scattering in optical fibers have been proposed [J. Intell. Mater. Syst. Struct.10, 340 (1999); Proc. SPIE5855, 555 (2005)]. We propose a simpler scheme based on fiber-end reflection and Brillouin gain spectrum analysis. In this setup, only one optical source is necessary to provide both the pump and the probe wave; the latter is provided by the modulated pulse base. First, the physical mechanisms for two different Brillouin scattering processes in our sensor system are analyzed and an approximate theory model is proposed. In addition, it is demonstrated that the simple system configuration allows simultaneous acquisition of the time-domain and the frequency-domain information. It is experimentally demonstrated that this configuration is effective for strain measurements and could as well be applied to temperature monitoring.
近年来，已经提出了几种基于光纤中受激布里渊散射的分布式传感器系统[《智能材料系统与结构杂志》10, 340 (1999); 《国际光学工程学会汇刊》5855, 555 (2005)]。我们提出了一种基于光纤端面反射和布里渊增益谱分析的更简单方案。在这种设置中，仅需一个光源来提供泵浦波和探测波；后者由调制脉冲基提供。首先，分析了我们传感器系统中两种不同布里渊散射过程的物理机制，并提出了一个近似理论模型。此外，证明了简单的系统配置允许同时获取时域和频域信息。实验表明，这种配置对于应变测量是有效的，也可应用于温度监测。
