Open AccessModal interferometer based on hollow-core photonic crystal fiber for strain and temperature measurement
Author(s) -
S. H. Aref,
Rodrigo AmezcuaCorrea,
J.R.F. Guedes de Carvalho,
Orlando Frazão,
Paulo Caldas,
J. L. Santos,
F. M. Araújo,
Hamid Latifi,
Faramarz Farahi,
L. A. Ferreira,
Jonathan C. Knight
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.018669
Subject(s) - photonic crystal fiber , optics , interferometry , materials science , interference (communication) , core (optical fiber) , optical fiber , fiber optic sensor , fiber , curvature , white light interferometry , graded index fiber , mode volume , single mode optical fiber , photonic crystal , polarization maintaining optical fiber , physics , telecommunications , channel (broadcasting) , geometry , mathematics , composite material , computer science
In this work, sensitivity to strain and temperature of a sensor relying on modal interferometry in hollow-core photonic crystal fibers is studied. The sensing structure is simply a piece of hollow-core fiber connected in both ends to standard single mode fiber. An interference pattern that is associated to the interference of light that propagates in the hollow core fundamental mode with light that propagates in other modes is observed. The phase of this interference pattern changes with the measurand interaction, which is the basis for considering this structure for sensing. The phase recovery is performed using a white light interferometric technique. Resolutions of +/- 1.4 microepsilon and +/- 0.2 degrees C were achieved for strain and temperature, respectively. It was also found that the fiber structure is not sensitive to curvature.