Slope-assisted fast distributed sensing in optical fibers with arbitrary Brillouin profile

被引：204
作者：
Peled, Yair [1 ]
Motil, Avi [1 ]
Yaron, Lior [1 ]
Tur, Moshe [1 ]
机构：
[1] Tel Aviv Univ, Fac Engn, IL-69978 Tel Aviv, Israel
来源：
OPTICS EXPRESS | 2011年 / 19卷 / 21期
基金：
以色列科学基金会;
关键词：
CORRELATION-DOMAIN ANALYSIS; DYNAMIC STRAIN-MEASUREMENT; ORDER SPATIAL-RESOLUTION; SINGLE-MODE FIBERS; SPECTRUM; SENSOR; SCATTERING;
D O I：
10.1364/OE.19.019845
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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
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页码：19845 / 19854
页数：10
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