Simultaneous measurement of partial pressure of O-2 and CO2 with a hybrid interferometer

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Luis Coelho (Autor) Outra; Paula A R Tafulo (Autor) Outra; Pedro A S Jorge (Autor) FCUP; Jose L Santos (Autor) FCUP; Diana Viegas (Autor) Outra; Kay Schuster (Autor) Outra; Jens Kobelke (Autor) Outra; Orlando Frazao (Autor) FCUP

Revista

Título: Optics Letters

Vol. 37

Páginas: 3063-3065

ISSN: 0146-9592

Editora: Optical Society of America

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 22 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-002-7B1

DOI: 10.1364/ol.37.003063

Abstract (EN): In this Letter, a hybrid interferometer for simultaneous measurement of the partial pressures of O-2 and CO2 mixtures is reported. The sensing head consists in the combination of two interferometric structures, one a Fabry-Perrot cavity and the other a modal interferometer. The intrinsic Fabry-Perot was formed by splicing a single mode fiber with a graded index fiber length that was then subjected to chemical etching creating an air cavity. The second interferometer is based on a splice of a pure silica tube in series with the Fabry-Perot. It was observed for a particular gas that its refractive index changes with pressure variation in a specific way, a characteristic that permitted the simultaneous measurement of partial pressures of CO2 and O-2 with rms deviations of similar to +/- 48.7 kPa and similar to +/- 20.1 kPa, respectively. (C) 2012 Optical Society of America

Idioma: Inglês

Tipo (Avaliação Docente): Científica