RT Journal Article T1 Measurement of the degree of salinity of water with a fiber-optic sensor A1 Esteban Martínez, Óscar A1 Navarrete Fernández, María Cruz A1 González Cano, Agustín A1 Bernabeu Martínez, Eusebio AB A fiber-optic sensor based on surface-plasmon resonance for the determination of the refractive index is used for measuring the degree of salinity of water. The transducing element consists of a multilayer structure deposited on a side-polished monomode optical fiber. Measuring the attenuation of the power transmitted by the fiber shows that a linear relation with the refractive index of the outer medium of the structure is obtained. The system is characterized by use of a varying refractive index obtained with a mixture of water and ethylene glycol. Experimental results show that the sensor can be used as a salinity-degree measurement device with environmental applications. PB The Optical Society Of America SN 1559-128X YR 1999 FD 1999-09-01 LK https://hdl.handle.net/20.500.14352/59242 UL https://hdl.handle.net/20.500.14352/59242 LA eng NO © Optical Society of America.We wish to thank to R. Alonso, C. Cosculluela, J. Pelayo, and F. Villuendas of the Department of Applied Physics, University of Zaragoza, Spain, for their support and for providing us with the sensors used for this work. This research has been supported by the European Union under Project SOFIE (spectroscopy using optical fibers in the marine environment), number MAS3-CT97-0157. NO Unión Europea (UE) DS Docta Complutense RD 17 abr 2025