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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 15 — Jul. 18, 2011
  • pp: 13880–13891

Bending insensitive sensors for strain and temperature measurements with Bragg gratings in Bragg fibers

Ningliang Liu, Yuhua Li, Ying Wang, Haiyan Wang, Wenbin Liang, and Peixiang Lu  »View Author Affiliations

Optics Express, Vol. 19, Issue 15, pp. 13880-13891 (2011)

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A novel fiber Bragg grating (FBG) has been inscribed in all solid Bragg fiber by an infrared femtosecond laser. Temperature, strain and bending characteristics of the induced FBG are investigated experimentally. Four resonant dips in the transmission spectrum show positive sensitivity for temperature/strain and zero-sensitivity for bending in wavelength. Cross-sensitivity between strain/temperature and bending can thus be avoided since the resonant wavelengths are insensitive to curvature variation when the fiber is bent toward two opposite directions. Evident wavelength hysteresis is observed during the isochronal annealing test and it can be eliminated by a pre-annealing treatment. These proposed FBGs are very attractive candidates for multi-parameter sensors in harsh environment.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:

Original Manuscript: April 14, 2011
Revised Manuscript: June 21, 2011
Manuscript Accepted: June 21, 2011
Published: July 6, 2011

Ningliang Liu, Yuhua Li, Ying Wang, Haiyan Wang, Wenbin Liang, and Peixiang Lu, "Bending insensitive sensors for strain and temperature measurements with Bragg gratings in Bragg fibers," Opt. Express 19, 13880-13891 (2011)

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