Enhancing temperature sensing features of FBGs by use of thin film aluminium coating

Michele A. Caponero; Francesca Bonfigli; Stefano Libera; Andrea Polimadei; Maria A. Vincenti; Alessandro Zini; Rosa M. Montereali

doi:10.1117/12.2026826

20 May 2013 Enhancing temperature sensing features of FBGs by use of thin film aluminium coating

Michele A. Caponero, Francesca Bonfigli, Stefano Libera, Andrea Polimadei, Maria A. Vincenti, Alessandro Zini, Rosa M. Montereali

Author Affiliations +

Proceedings Volume 8794, Fifth European Workshop on Optical Fibre Sensors; 87943R (2013) https://doi.org/10.1117/12.2026826
Event: Fifth European Workshop on Optical Fibre Sensors, 2013, Krakow, Poland

Abstract

In this work we tested use of thin film aluminium coating to enhance the temperature sensing features of FBG sensors. Thin film coating was evaporated on the Bragg grating after removal of the original acrylate recoating, using a modified vacuum evaporation system that allows uniform radial deposition around the fibre. Results show that recoating thickness up to 0.5 μm do not produce appreciable effects, whereas thickness of 2.3 μm appreciably increases temperature sensitivity without increasing time response constant.

Citation Download Citation

Michele A. Caponero, Francesca Bonfigli, Stefano Libera, Andrea Polimadei, Maria A. Vincenti, Alessandro Zini, and Rosa M. Montereali "Enhancing temperature sensing features of FBGs by use of thin film aluminium coating", Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87943R (20 May 2013); https://doi.org/10.1117/12.2026826

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