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Proceedings Paper

Long term strain behavior of PMMA-based polymer optical fibers
Author(s): Ivan-Lazar Bundalo; Kristian Nielsen; Getinet Woyessa; Ole Bang
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Paper Abstract

We are reporting on the viscoelasticity of PMMA based Fiber Bragg Grating (FBG) strain sensors when exposed to repeated sequences of long term strain and relaxation with various duty-cycles. In terms of the FBG wavelength and how it follows the strain cycle, we have shown that in the small strain regime (up to 1%) an elastic-dominated fast relaxing range, which is followed by a mainly viscous relaxation, depends both on the strain level and on the strain duration. For a small ratio of the strain-relax durations, this fast relaxation range stays almost the same. However, with increasing strain duration, for the same relaxation time, this range will be shortened, which might influence the sensing capabilities of the fiber sensor.

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347Y (28 September 2015); doi: 10.1117/12.2195267
Show Author Affiliations
Ivan-Lazar Bundalo, Technical Univ. of Denmark (Denmark)
Kristian Nielsen, Technical Univ. of Denmark (Denmark)
Getinet Woyessa, Technical Univ. of Denmark (Denmark)
Ole Bang, Technical Univ. of Denmark (Denmark)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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