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对光纤喇曼散射技术用于铁轨温度监测的方法进行了理论和实验研究。采用大功率半导体脉冲激光器为泵浦光源和背向散射法对光纤中的背向喇曼散射(斯托克斯散射和反斯托克斯散射)进行测量。缠绕式光纤传感器模式中采用结果表明,该方法对采用传统方法难以实现的铁轨温度进行监测是可行的,且具有结构简单、成本低廉以及与结构兼容性好的优点。
The theoretical and experimental studies on the method of optical fiber Raman scattering for rail temperature monitoring are carried out. High-power semiconductor pulsed lasers were used to measure back-facing Raman scattering (Stokes scattering and anti-Stokes scattering) in optical fibers for pump light sources and backscattering. The results show that this method is feasible to monitor the rail temperature which is difficult to be achieved by traditional methods, and has the advantages of simple structure, low cost and good compatibility with the structure.