Gas sensor based on photonic crystal fibres in the 2ν3 and ν2 + 2ν3 vibrational bands of methane
In this work, methane detection is performed on the 2º3 and º2 + 2º3 absorption bands in the Near-Infrared (NIR) wavelength region using an all-fibre optical sensor. Hollowcore photonic bandgap fibres (HC-PBFs) are employed as gas cells due to their compactness, good integrability in optical systems...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2009 |
| País: | España |
| Institución: | Universidad de Cantabria (UC) |
| Repositorio: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unican.es:10902/842 |
| Acceso en línea: | http://hdl.handle.net/10902/842 |
| Access Level: | acceso abierto |
| Palabra clave: | Gas detectors Methane Fibre optic sensors Photonic crystal fibres Photonic bandgap fibres Hollow-core Absorption spectroscopy |
| Sumario: | In this work, methane detection is performed on the 2º3 and º2 + 2º3 absorption bands in the Near-Infrared (NIR) wavelength region using an all-fibre optical sensor. Hollowcore photonic bandgap fibres (HC-PBFs) are employed as gas cells due to their compactness, good integrability in optical systems and feasibility of long interaction lengths with gases. Sensing in the 2º3 band of methane is demonstrated to achieve a detection limit one order of magnitude better than that of the º2 + 2º3 band. Finally, the filling time of a HC-PBF is demonstrated to be dependent on the fibre length and geometry. |
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