Open AccessMulti-parameter distributed fiber sensing with higher-order optical and acoustic modes
Author(s) -
Jian Fang,
Giovanni Milione,
Jeffery S. Stone,
Gaozhu Peng,
Ming-Jun Li,
Ezra Ip,
Yaowen Li,
Philip N. Ji,
Yue-Kai Huang,
Ming-Fang Huang,
Shuji Murakami,
William Shieh,
Ting Wang
Publication year - 2019
Publication title -
optics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.001096
Subject(s) - distributed acoustic sensing , optics , reflectometry , materials science , optical fiber , brillouin scattering , core (optical fiber) , mode volume , brillouin zone , fiber , single mode optical fiber , fiber optic sensor , polarization maintaining optical fiber , time domain , physics , computer science , composite material , computer vision
We propose a novel multi-parameter sensing technique based on a Brillouin optical time domain reflectometry in the elliptical-core few-mode fiber, using higher-order optical and acoustic modes. Multiple Brillouin peaks are observed for the backscattering of both the LP 01 mode and LP 11 mode. We characterize the temperature and strain coefficients for various optical-acoustic mode pairs. By selecting the proper combination of modes pairs, the performance of multi-parameter sensing can be optimized. Distributed sensing of temperature and strain is demonstrated over a 0.5-km elliptical-core few-mode fiber, with the discriminative uncertainty of 0.28°C and 5.81 με for temperature and strain, respectively.
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