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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 10 — May. 15, 2014
  • pp: 3026–3029

Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors

Wei Zhang and David J. Webb  »View Author Affiliations


Optics Letters, Vol. 39, Issue 10, pp. 3026-3029 (2014)
http://dx.doi.org/10.1364/OL.39.003026


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Abstract

The humidity response of poly(methyl methacrylate) (PMMA)-based optical fiber Bragg gratings (POFBGs) has been studied. The characteristic wavelength of the grating is modulated by water absorption-induced swelling and refractive index change in the fiber. This work indicates that anisotropic expansion may exist in PMMA optical fiber, reducing the humidity responsivity of the grating and introducing uncertainty in the responsivity from fiber to fiber. By pre-straining a grating, one can get rid of this uncertainty and simultaneously improve the POFBG response time.

© 2014 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(250.5460) Optoelectronics : Polymer waveguides
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 10, 2014
Revised Manuscript: April 11, 2014
Manuscript Accepted: April 12, 2014
Published: May 14, 2014

Citation
Wei Zhang and David J. Webb, "Humidity responsivity of poly(methyl methacrylate)-based optical fiber Bragg grating sensors," Opt. Lett. 39, 3026-3029 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-10-3026


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References

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