Title :
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
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;
Conference_Titel :
SENSORS, 2013 IEEE
Conference_Location :
Baltimore, MD
DOI :
10.1109/ICSENS.2013.6688557
