Distributed acoustic sensor based on a two-mode fiber

被引：25
作者：
Chen, Mengmeng [1 ,2 ]
Masoudi, Ali [2 ]
Parmigiani, Francesca [2 ,3 ]
Brambilla, Gilberto [2 ]
机构：
[1] Nanjing Xiaozhuang Univ, Sch Elect & Engn, Nanjing 211171, Jiangsu, Peoples R China
[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[3] Microsoft Res, Cambridge CB1 2FB, England
来源：
OPTICS EXPRESS | 2018年 / 26卷 / 19期
基金：
英国工程与自然科学研究理事会;
关键词：
FEW-MODE FIBER; MULTIMODE OPTICAL-FIBERS; RAYLEIGH BACKSCATTERING; TEMPERATURE SENSOR; FUNDAMENTAL MODE; STRAIN SENSOR; OTDR; INTERFERENCE; SCATTERING; CURVATURE;
D O I：
10.1364/OE.26.025399
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A distributed optical fiber dynamic strain sensor also known as a distributed acoustic sensor (DAS) based on two-mode fiber is demonstrated. By using phi-OTDR interrogation technique, the backscattered light from higher order modes can be used to fully quantify vibrations along the sensing fiber. In addition, by combining the results obtained from different modes, 2.52dB improvement in noise floor is achieved. These results confirm that few-mode fibers can be used for DAS applications. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License.
引用
收藏
页码：25399 / 25407
页数：9
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