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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 14 — May. 10, 2012
  • pp: 2733–2738

Discrimination between strain and temperature by cascading single-mode thin-core diameter fibers

Jie Shi, Shilin Xiao, Miehua Bi, Lilin Yi, and Pei Yang  »View Author Affiliations


Applied Optics, Vol. 51, Issue 14, pp. 2733-2738 (2012)
http://dx.doi.org/10.1364/AO.51.002733


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Abstract

A simple fiber-optic sensor capable of discrimination between temperature and strain is proposed and experimentally demonstrated. The sensor head is formed by cascading two sections of single-mode thin-core diameter fibers (TCFs) that act as two different inter-modal interferometers (IMIs). Due to the different sensitivity responses of the two IMIs to strain and temperature, it is possible to discriminate temperature and strain by monitoring the resonant wavelength shifts. The experimental results indicate that the measured strain and temperature resolutions are 37.41 με and 0.732 °C within a strain range of 0–1333.3 με and a temperature range from 26.9 °C to 61.7 °C. The sensing sensitivities of strain and temperature are 1.03pm/με and 30.74pm/°C, respectively. The proposed sensor features the advantages of easy fabrication, low cost and high sensitivity, and it exhibits great potential in dual-parameter measurement.

© 2012 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 29, 2011
Revised Manuscript: February 4, 2012
Manuscript Accepted: February 6, 2012
Published: May 10, 2012

Citation
Jie Shi, Shilin Xiao, Miehua Bi, Lilin Yi, and Pei Yang, "Discrimination between strain and temperature by cascading single-mode thin-core diameter fibers," Appl. Opt. 51, 2733-2738 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-14-2733

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