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Proceedings Paper

All-fiber sensor based on a metallic coated hybrid LPG-FBG structure for thermal characterization of materials
Author(s): G. E. Silva; P. Caldas; J. C. Santos; J. L. Santos
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Paper Abstract

In this paper it is presented an all-fiber implementation of the hot-wire needle probe concept, widely used to measure the thermal properties of materials, particularly the thermal conductivity. It is based on the heating of a metal thin film deposited on the surface of the fiber induced by the coupling of laser light into the cladding via a long period grating, and determination, using a fiber Bragg grating, of the time dependence of the temperature of the surrounding medium at a fixed distance of the fiber. The medium considered in this research was the air and the results obtained indicate the feasibility of this approach and point out future developments.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91571R (2 June 2014); doi: 10.1117/12.2059655
Show Author Affiliations
G. E. Silva, Univ. de São Paulo (Brazil)
P. Caldas, INESC Porto (Portugal)
Instituto Politécnico de Viana do Castelo (Portugal)
J. C. Santos, Univ. de São Paulo (Brazil)
J. L. Santos, INESC Porto (Portugal)
Univ. do Porto (Portugal)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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