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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 25 — Sep. 1, 2012
  • pp: 6179–6187

Residual-stress relaxation and densification in CO2-laser-induced long-period fiber gratings

Michael R. Hutsel and Thomas K. Gaylord  »View Author Affiliations


Applied Optics, Vol. 51, Issue 25, pp. 6179-6187 (2012)
http://dx.doi.org/10.1364/AO.51.006179


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Abstract

The first concurrent measurements of the three-dimensional refractive-index and residual-stress distributions in a CO2-laser-irradiated fiber are presented. A Corning SMF-28 fiber was exposed from one side to focused pulses with durations of 100–500 ms. The cross-sectional form of the index modulation is asymmetric with changes concentrated on the side of the fiber facing the exposure. The longitudinal form is Gaussian-like with a wide top and extends approximately 100  μm from the center of the exposure. Relaxation of frozen-in viscoelasticity results in a maximum index modulation of 5×104 on the side of the fiber facing the exposure with mechanical stress relaxation contributing changes of less than 1×104.

© 2012 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2400) Fiber optics and optical communications : Fiber properties
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: June 29, 2012
Manuscript Accepted: July 19, 2012
Published: August 29, 2012

Citation
Michael R. Hutsel and Thomas K. Gaylord, "Residual-stress relaxation and densification in CO2-laser-induced long-period fiber gratings," Appl. Opt. 51, 6179-6187 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-25-6179

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