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| Naji, M. |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Azevedo, Nuno Monteiro |
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Tafulo, Par
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Publications (7/7 displayed)
- 2012Simultaneous Measurement of Partial Pressure of O-2 and CO2 using Hybrid interferometer
- 2012Intrinsic Fabry-Perot Cavity Sensor Based on Etched Multimode Graded Index Fiber for Strain and Temperature Measurementcitations
- 2012Simultaneous measurement of partial pressure of O-2 and CO2 with a hybrid interferometercitations
- 2012Fabry-Perot cavities based on chemical etching for high temperature and strain measurementcitations
- 2011Optical Fibre Hydrogen Sensors Based on Palladium Coatings
- 2011Fabry-Perot cavities based on chemical etching for high temperature and strain sensingcitations
- 2010Intrinsic Fabry-Perot cavity sensor based on chemical etching of a multimode graded index fiber spliced to a single mode fibercitations
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article
Simultaneous measurement of partial pressure of O-2 and CO2 with a hybrid interferometer
Abstract
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