Measurement of the degree of salinity of water with a fiber-optic sensor | Zendy

Óscar Esteban | Zendy; Maria Cruz-Navarrete | Zendy; Agustı́n González-Cano | Zendy; Eusebio Bernabéu | Zendy

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Measurement of the degree of salinity of water with a fiber-optic sensor

Author(s) -

Óscar Esteban,

Maria Cruz-Navarrete,

Agustı́n González-Cano,

Eusebio Bernabéu

Publication year - 1999

Publication title -

applied optics

Language(s) - English

Resource type - Journals

ISSN - 0003-6935

DOI - 10.1364/ao.38.005267

Subject(s) - refractive index , materials science , optical fiber , optics , fiber optic sensor , attenuation , degree (music) , salinity , fiber , refractometer , optical power , optoelectronics , acoustics , composite material , geology , laser , oceanography , physics

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.

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