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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 2 — Jan. 15, 2013
  • pp: 214–216

Bend measurement using an etched fiber incorporating a fiber Bragg grating

Abdul Rauf, Jianlin Zhao, Biqiang Jiang, Yajun Jiang, and Wei Jiang  »View Author Affiliations


Optics Letters, Vol. 38, Issue 2, pp. 214-216 (2013)
http://dx.doi.org/10.1364/OL.38.000214


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Abstract

A fiber Bragg grating (FBG) based bend measurement method using an etched fiber is proposed that utilizes the coupling of the core mode to the cladding and radiation modes at the bending region. An etching region of 99 µm diameter that serves as bend sensing head is achieved at 10 mm upstream the FBG through processing in 40% hydrofluoric acid, while the FBG acts as a narrowband reflector to enhance the sensitivity. The power variation curves are obtained for a wide range of bend angles, but the performance is limited due to the presence of the loss peaks. The sensing response is improved by immersing the etching region in a refractive index matching gel. The results are analyzed by using curve fitting formulas and are in good agreement. A large dynamic range of 27° to +27° and sensitivity of 0.43dBm/deg is achieved, which can be enhanced by reducing the etched diameter.

© 2013 Optical Society of America

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

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 19, 2012
Revised Manuscript: December 10, 2012
Manuscript Accepted: December 12, 2012
Published: January 14, 2013

Citation
Abdul Rauf, Jianlin Zhao, Biqiang Jiang, Yajun Jiang, and Wei Jiang, "Bend measurement using an etched fiber incorporating a fiber Bragg grating," Opt. Lett. 38, 214-216 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-2-214


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