Slope-assisted fast distributed sensing in optical fibers with arbitrary Brillouin profile
Slope-assisted fast distributed sensing in optical fibers with arbitrary Brillouin profile
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DOI：
10.1364/oe.19.019845
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发表时间：
2011-10-10
期刊：
影响因子：
3.8
通讯作者：
Tur, Moshe
中科院分区：
文献类型：
--
作者：
Peled, Yair;Motil, Avi;Tur, Moshe
我们提出了一种基于受激布里渊散射（SBS）的新颖方法，用于沿传感光纤的整个长度同时分布式测量快速应变变化。使用专门合成的适应性强的探测波，将布里渊相互作用始终置于局部布里渊增益谱的斜率上，从而允许单个泵浦脉冲沿光纤的全长采样快速应变变化，并具有布里渊频移的任意分布。在该方法的早期演示中，演示了数百 Hz 的应变振动，在 85 m 长光纤的两个不同部分上同时测量，具有不同的静态布里渊位移，空间分辨率为 1.5 m。 (C) 2011 美国光学学会
We present a novel method, based on stimulated Brillouin scattering (SBS), for the simultaneous distributed measurement of fast strain variations along the entire length of the sensing fiber. A specially synthesized and adaptable probe wave is used to place the Brillouin interaction always on the slope of the local Brillouin gain spectrum, allowing a single pump pulse to sample fast strain variations along the full length of a fiber with an arbitrary distribution of the Brillouin frequency shift. In this early demonstration of the method, strain vibrations of a few hundred Hz are demonstrated, simultaneously measured on two different sections of an 85m long fiber, having different static Brillouin shifts and with a spatial resolution of 1.5m. (C) 2011 Optical Society of America