RT Journal Article
T1 A fibre-optic temperature sensor based on the deposition of a thermochromic material on an adiabatic taper
A1 Díaz Herrera, Natalia
A1 Navarrete Fernández, María Cruz
A1 Esteban Martínez, Óscar
A1 González Cano, Agustín
AB A fibre-optic sensor has been developed for the measurement of temperature, especially of liquids. The device is conceived as part of an all-optical CTD probe for the control of the physical parameters of a marine medium. The dependence on temperature of the optical properties (specifically, absorbance) of a thermochromic material, namely lophine (2,4,5-triphenylimidazole), is the basis of the sensor. The sensor presents some significant differences with respect to other similar sensors proposed in the literature: the use of adiabatic, long, tapered optical fibres with adjustable geometric parameters; the use of LED illumination in the 800 nm range; improvements in the deposition technique, etc. The sensors show a linear behaviour over the desired temperature range, and their sensitivity is high. Also, the dependence of the response of the sensor with variations of the geometry of the tapers is discussed. Specifically, we have performed measurements with different diameters of the taper waist, and we show the dependence of the slope of the response curve with that parameter.
PB IOP Publishing Ltd.
SN 0957-0233
YR 2004
FD 2004-02
LK https://hdl.handle.net/20.500.14352/50968
UL https://hdl.handle.net/20.500.14352/50968
LA eng
NO © 2004 IOP Publishing Ltd.This work has been partially supported by European Project MISPEC, contract number EVK3-CT2000-00519 and Spanish Project OPTIMA, Programa Nacional de Recursos Naturales, MCYT, ref. REN2001-1495. We are indebted to C. Fernández-Valdivielso, F J Arregui and  I. Matías of the Universidad Pública de Navarra (Spain) for their help and support.
NO European Union
NO Ministerio de Ciencia y Tecnología (MCYT), España
DS Docta Complutense
RD 21 sept 2025