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Characteristics of Resonantly-Guided Modes in Microstructured Optical Fibers
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Photonics 2014, 1(4), 516-529;

Refractive Index Measurement of Liquids Based on Microstructured Optical Fibers

INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
ISMAI−Instituto Universitário da Maia, Av. Carlos Oliveira Campos−Castelo da Maia, 4475-690 Maia, Portugal
Departamento de Física e Astronomia da Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 31 October 2014 / Revised: 3 December 2014 / Accepted: 3 December 2014 / Published: 8 December 2014
(This article belongs to the Special Issue Photonic Crystal Sensors)
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This review is focused on microstructured optical fiber sensors developed in recent years for liquid RI sensing. The review is divided into three parts: the first section introduces a general view of the most relevant refractometric sensors that have been reported over the last thirty years. Section 2 discusses several microstructured optical fiber designs, namely, suspended-core fiber, photonic crystal fiber, large-core air-clad photonic crystal fiber, and others. This part is also divided into two main groups: the interferometric-based and resonance-based configurations. The sensing methods rely either on full/selective filling of the microstructured fiber air holes with a liquid analyte or by simply immersing the sensing fiber into the liquid analyte. The sensitivities and resolutions are tabled at the end of this section followed by a brief discussion of the obtained results. The last section concludes with some remarks about the microstructured fiber-based configurations developed for RI sensing and their potential for future applications. View Full-Text
Keywords: optical fiber sensors; microstructured fibers; refractive index optical fiber sensors; microstructured fibers; refractive index

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Silva, S.; Roriz, P.; Frazão, O. Refractive Index Measurement of Liquids Based on Microstructured Optical Fibers. Photonics 2014, 1, 516-529.

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