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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 21 — Oct. 8, 2012
  • pp: 23744–23754

Thermo-optic coefficient measurement of liquids based on simultaneous temperature and refractive index sensing capability of a two-mode fiber interferometric probe

Young Ho Kim, Seong Jun Park, Sie-Wook Jeon, Seongmin Ju, Chang-Soo Park, Won-Taek Han, and Byeong Ha Lee  »View Author Affiliations

Optics Express, Vol. 20, Issue 21, pp. 23744-23754 (2012)

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A fiber-optic interferometric probe based on a two-mode fiber (TMF) is proposed and demonstrated for measuring the thermo-optic coefficients (TOCs) of liquid samples. The proposed probe can be simply fabricated by fusion-splicing a short piece of TMF to a lead single mode fiber (SMF) with small lateral offset, which makes interference between LP01 and LP02 modes. The sensing responses of the probe to temperature and surrounding refractive index (SRI) have been experimentally investigated to show the capability of simultaneous measurements; the phase change of the reflection spectrum was related to temperature variation and the intensity change was to SRI variation. The data analysis is made not only in the spectral domain but in the Fourier domain also to effectively quantify the measurements. The TOCs of several liquid samples including water, ethanol, and acetone have been obtained with the proposed method.

© 2012 OSA

OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:

Original Manuscript: August 23, 2012
Revised Manuscript: September 24, 2012
Manuscript Accepted: September 24, 2012
Published: October 2, 2012

Young Ho Kim, Seong Jun Park, Sie-Wook Jeon, Seongmin Ju, Chang-Soo Park, Won-Taek Han, and Byeong Ha Lee, "Thermo-optic coefficient measurement of liquids based on simultaneous temperature and refractive index sensing capability of a two-mode fiber interferometric probe," Opt. Express 20, 23744-23754 (2012)

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