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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 21 — Oct. 12, 2009
  • pp: 18669–18675

Modal interferometer based on hollow-core photonic crystal fiber for strain and temperature measurement

S. H. Aref, R. Amezcua-Correa, J. P. Carvalho, O. Frazão, P. Caldas, J. L. Santos, F. M. Araújo, H. Latifi, F. Farahi, L. A. Ferreira, and J. C. Knight  »View Author Affiliations

Optics Express, Vol. 17, Issue 21, pp. 18669-18675 (2009)

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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 ± 1.4µε and ± 0.2°C were achieved for strain and temperature, respectively. It was also found that the fiber structure is not sensitive to curvature.

© 2009 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(230.3990) Optical devices : Micro-optical devices
(060.5295) Fiber optics and optical communications : Photonic crystal fibers

ToC Category:
Photonic Crystal Fibers

Original Manuscript: August 17, 2009
Revised Manuscript: September 26, 2009
Manuscript Accepted: September 27, 2009
Published: October 1, 2009

S. H. Aref, R. Amezcua-Correa, J. P. Carvalho, O. Frazão, P. Caldas, J. L. Santos, F. M. Araújo, H. Latifi, F. Farahi, L. A. Ferreira, and J. C. Knight, "Modal interferometer based on hollow-core photonic crystal fiber for strain and temperature measurement," Opt. Express 17, 18669-18675 (2009)

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