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Simple model of compound waveguide structures used as fiber-optic sensors

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2000-03
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Elsevier Sci. Ltd.
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In this work we present an application of a simple quasi-geometrical model to analyze the behavior of compound waveguide structures used as fiber-optic sensors. This theoretical model is based on the adjustment of the parameters of the structure from the experimental measures to predict the observed behavior of the device. It also takes into account the non-monocromaticity of the used source. In this way, it can be used as a design criterion for this kind of structures. It is applied to a refractive index fiber-optic sensor based on the excitation of surface plasmon in a metal layer by the light guided by a monomode fiber.
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© 2000 Elsevier Science Ltd. We wish to thank Prof. Patterson for his kind help and interesting suggestions and J. Pelayo, C. Cosculluela and F. Villuendas, of the Departamento de Física Aplicada of the Universidad of Zaragoza (Spain) for providing us with the sensors. This work has been supported by European Union project SOFIE (Spectroscopy using Optical Fibers in the Marine Environment), Contract Number MAS3-CT97-0157 and by Project HID98-0719 `Teledetección in-situ del grado de salinidad del agua por una red de sensores de fibra óptica, of the Plan Nacional de I+D of Spain.
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