Discrimination of temperature and axial strain using dispersion effects of high-order-mode fibers

Author

Yanping Xu ; Ping Lu ; Jia Song ; Liang Chen ; Xiaoyi Bao ; Xiaopeng Dong

Author_Institution

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

fYear

2013

fDate

3-6 Nov. 2013

Firstpage

1

Lastpage

4

Abstract

A new approach based on dispersion effects of a high-order-mode fiber (HOMF) is proposed to effectively discriminate changes in both environmental temperature and axial strain. Characterization and theoretical simulation of the HOMF modal interferometer with a SMF(single-mode fiber)-HOMF-SMF structure exhibit an excellent agreement with experimental results. A fast Fourier transform method of interferometry in the spatial frequency domain is adopted to distinguish coupling between different core-guided modes. Distinct phase sensitivities of different dispersion peaks are extracted by employing a novel phase demodulation scheme to realize dual-parameter sensing.

Keywords

Fourier transform optics; fast Fourier transforms; fibre optic sensors; light interferometry; optical fibre dispersion; spectral methods of temperature measurement; strain measurement; HOMF modal interferometer; SMF; axial strain discrimination; core guided mode; dispersion effect; dual parameter sensing; fast Fourier transform method; high order mode fiber; single mode fiber; spatial frequency domain; temperature discrimination; Couplings; Optical fiber dispersion; Optical fiber sensors; Optical fibers; Optical interferometry; Strain;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2013 IEEE

Conference_Location

Baltimore, MD

ISSN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2013.6688557

Filename

6688557