Brillouin Spectrum in LEAF and Simultaneous Temperature and Strain Measurement

Author

Liu, Xuan ; Bao, Xiaoyi

Author_Institution

Dept. of Phys., Univ. of Ottawa, Ottawa, ON, Canada

Volume

30

Issue

8

fYear

2012

fDate

4/15/2012 12:00:00 AM

Firstpage

1053

Lastpage

1059

Abstract

The triangle refractive index profile of LEAF fiber (a non-zero dispersion shifted fiber) makes it much more sensitive to temperature and strain. Owing to its high stimulated Brillouin scattering (SBS) threshold for long distance distributed sensors, we studied the Brillouin spectrum characteristics of LEAF under different strain and temperature conditions. The results are compared with those of SMF-28. Based on the linear relationship between the four peaks´ linewidth/peak frequency and strain/temperature, we achieved a strain error of 37 με and a temperature error of 1.8^°C with a spatial resolution of 4 m for simultaneous temperature and strain measurement.

Keywords

distributed sensors; fibre optic sensors; optical fibre dispersion; refractive index measurement; stimulated Brillouin scattering; strain measurement; temperature measurement; Brillouin spectra; Brillouin spectrum; LEAF fiber; long distance distributed sensor; non zero dispersion shifted fiber; stimulated Brillouin scattering; strain measurement; temperature measurement; triangle refractive index profile; Optical fiber amplifiers; Optical fiber polarization; Scattering; Strain; Temperature measurement; Temperature sensors; LEAF fiber; stimulated Brillouin scattering; strain; temperature; waveguide;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2011.2168193

Filename

6018973