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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 3 — Jan. 20, 2010
  • pp: 536–541

Strain sensor based on a pair of single-mode–multimode–single-mode fiber structures in a ratiometric power measurement scheme

Agus Muhamad Hatta, Yuliya Semenova, Qiang Wu, and Gerald Farrell  »View Author Affiliations


Applied Optics, Vol. 49, Issue 3, pp. 536-541 (2010)
http://dx.doi.org/10.1364/AO.49.000536


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Abstract

The strain and temperature dependencies of a step-index single-mode–multimode–single-mode (SMS) fiber structure are investigated numerically and experimentally. For intensity-based strain measurement using a single SMS fiber structure, at a selected wavelength, it is found that there is a high strain dependence, but also a temperature dependence that will induce strain measurement error. To minimize the temperature-induced strain measurement error, two SMS fiber structures are proposed and demonstrated in a ratiometric power measurement scheme; one SMS structure acts as the strain sensor, and the other SMS structure acts as the temperature monitor. The extracted temperature information is used to determine a strain value based on a suitable calibration of strain responses with temperature variations. It is demonstrated that for strain measurement from 0 to 1000 μ ε within the temperature range from 10 ° C to 40 ° C , the proposed configuration can provide a strain and temperature resolution of 0.34 μ ε and 0.14 ° C , respectively, with a temperature-induced strain measurement error as low as 0.39 μ ε .

© 2010 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: October 29, 2009
Revised Manuscript: December 17, 2009
Manuscript Accepted: December 17, 2009
Published: January 20, 2010

Citation
Agus Muhamad Hatta, Yuliya Semenova, Qiang Wu, and Gerald Farrell, "Strain sensor based on a pair of single-mode-multimode-single-mode fiber structures in a ratiometric power measurement scheme," Appl. Opt. 49, 536-541 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-3-536

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