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

Barbara Hopf; Alexander W. Koch; Johannes Roths

doi:10.1117/12.2236839

30 May 2016 Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors

Barbara Hopf, Alexander W. Koch, Johannes Roths

Author Affiliations +

Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 99160M (2016) https://doi.org/10.1117/12.2236839
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland

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.

Citation Download Citation

Barbara Hopf, Alexander W. Koch, and Johannes Roths "Nonlinear temperature dependence of glue-induced birefringence in polarization maintaining FBG sensors", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 99160M (30 May 2016); https://doi.org/10.1117/12.2236839

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