Long term strain behavior of PMMA-based polymer optical fibers

Ivan-Lazar Bundalo; Kristian Nielsen; Getinet Woyessa; Ole Bang

doi:10.1117/12.2195267

28 September 2015 Long term strain behavior of PMMA-based polymer optical fibers

Ivan-Lazar Bundalo, Kristian Nielsen, Getinet Woyessa, Ole Bang

Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96347Y (2015) https://doi.org/10.1117/12.2195267
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil

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.

Citation Download Citation

Ivan-Lazar Bundalo, Kristian Nielsen, Getinet Woyessa, and Ole Bang "Long term strain behavior of PMMA-based polymer optical fibers", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96347Y (28 September 2015); https://doi.org/10.1117/12.2195267

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