Investigation of coating impact on OFDR optical remote fiber-based sensors performances for their integration in high temperature and radiation environments

RIZZOLO, Serena
MORANA, Adriana
CANNAS, Marco
Marin, E.
Boukenter, A.
Ouerdane, Y.
Perisse, J.
Bauer, S.
Mace, J.
Girard, S.

Open link

Publication date

January 2016

DOI

10.1109/JLT.2016.2552459

Publisher

Institute of Electrical and Electronics Engineers Inc.

Abstract

The response of optical frequency-domain reflectometry-based temperature sensors is here investigated in harsh environments (high temperature, high radiation dose) focusing the attention on the impact of the fiber coating on the sensor performances in such conditions. Our results demonstrate that the various coating types evolve differently under thermal treatment and/or radiations, resulting in a small (<5%) change in the temperature coefficient of the sensor. The identified procedure, consisting of a prethermal treatment of the fiber at its maximum coating operating temperature, is here verified up to 150 °C for higherature acrylate and up to 300 °C for polyamide coating. This method allows a stabilization of the temperature coefficients....