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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 11 — Apr. 10, 2013
  • pp: 2478–2483

Wavelength evolution of long-period fiber gratings in a water environment

Qiang Zhao, Yi Qu, Yong-Jie Wang, and Fang Li  »View Author Affiliations


Applied Optics, Vol. 52, Issue 11, pp. 2478-2483 (2013)
http://dx.doi.org/10.1364/AO.52.002478


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Abstract

In a water environment, wavelength evolution behavior of long-period fiber gratings (LPFGs) written in H2-loaded fibers after annealing is studied. The phenomena that wavelength shifts in the longer wavelength direction and then in the shorter wavelength direction is observed. A shift of the grating resonance peak (LP05) of as much as 2.5 nm is found. A water-mediated model that water molecules induce the second diffusion of the remaining H2 in the fiber and a diffusion-reaction mechanism that water molecules penetrate into fiber internal structures are proposed and are combined to explain the wavelength evolution process. Both the calculated balance point time according to the model, and the qualitative analysis according to the mechanism, correspond well with the experimental results. This research indicates that wavelength variation has to be considered or prevented when H2-loaded LPFGs are used in a water environment.

© 2013 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 15, 2012
Revised Manuscript: February 24, 2013
Manuscript Accepted: March 4, 2013
Published: April 10, 2013

Citation
Qiang Zhao, Yi Qu, Yong-Jie Wang, and Fang Li, "Wavelength evolution of long-period fiber gratings in a water environment," Appl. Opt. 52, 2478-2483 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-11-2478

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