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Proceedings Paper

Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors
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Paper Abstract

Glue-induced stresses decrease the accuracy of surface-mounted fiber Bragg gratings (FBG). Significant temperature dependent glue-induced birefringence was verified when a thermally cured epoxy-based bonding technique had been used. Determining the peak separation of two azimuthally aligned FBGs in PM fibers combined with a polarization resolved measurement set-up in a temperature range between -30°C and 150°C revealed high glue-induced stresses at low temperatures. Peak separations of about 60 pm and a nonlinear temperature dependence of the glue-induced birefringence due to stress relaxation processes and a visco-elastic behavior of the used adhesive have been shown.

Paper Details

Date Published: 30 May 2016
PDF: 4 pages
Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160M (30 May 2016); doi: 10.1117/12.2236839
Show Author Affiliations
Barbara Hopf, Munich Univ. of Applied Sciences (Germany)
Alexander W. Koch, Technical Univ. of Munich (Germany)
Johannes Roths, Munich Univ. of Applied Sciences (Germany)

Published in SPIE Proceedings Vol. 9916:
Sixth European Workshop on Optical Fibre Sensors
Elfed Lewis, Editor(s)

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