Optical fiber refractometer based on a Fabry-Perot interferometer

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Susana F O Silva (Autor) Outra; Frazao, O (Autor) Outra; Paul Caldas (Autor) Outra; Jose L Santos (Autor) FCUP; Araujo, FM (Autor) Outra; Luis A Ferreira (Autor) Outra

Revista

Título: Optical Engineering

Vol. 47

Página Final: 054403

ISSN: 0091-3286

Editora: SPIE

Indexação

ISI Web of Knowledge - 38 Citações

Scopus - 42 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-003-ZWM

DOI: 10.1117/1.2931527

Abstract (EN): A fiber optic sensor for liquid refractive index measurement based on a Fabry-Perot interferometer is described. The interferometer is achieved between the reflection of a short fiber Bragg grating and the Fresnel reflection from the cleaved fiber end. This fiber end is then in contact with the liquid sample to provide refractive index measurements. The sensor is characterized by immersing the fiber tip in distilled water with different concentrations of ethylene glycol. A linear relation of the interferometer fringe visibility with refractive index variation is observed, and a resolution of similar to 10(-3) is obtained. It is also shown that the sensor operation is independent of temperature effects, other than the one related to temperature-induced change of the liquid refractive index. (c) 2008 Society of Photo-Optical Instrumentation Engineers.

Idioma: Inglês

Tipo (Avaliação Docente): Científica