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Proceedings Paper

Novel multipass absorption cell for carbon dioxide detection
Author(s): Olga M. Conde; Sergio Garcia; Roberto Garcia; Adolfo Cobo; Jose Miguel Lopez-Higuera
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Paper Abstract

Infrared Spectroscopy has been confirmed as an interesting technique in the process of environmental pollution monitoring. This detection technique is related to the absorption coefficient of each hazardous gaseous compound. When this coefficient is low, as in the case of carbon dioxide, or else, when the gas concentration is small, the transducer has to be designed in order to maximize the interaction between the gaseous compound and the light beam. In addition, the gas cell must be portable, low-size and cost effective. The multipass absorption cell presented in this communication satisfies both requirements, compact physical size and large interaction length. The design is based on a cylindrical cell with a reflective configuration. The dimensions of this cell are carefully adjusted in order to have a completely closed optical path around the contaminant. With this structure, an optical path about 313 cm. could be achieved with a physical size of 20 cm. In this communication, theoretical simulation and preliminary results will be presented to demonstrate the functionality and versatility of the developed gas cell.

Paper Details

Date Published: 14 February 2002
PDF: 8 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456099
Show Author Affiliations
Olga M. Conde, Univ. de Cantabria (Spain)
Sergio Garcia, Univ. de Cantabria (Spain)
Roberto Garcia, Univ. de Cantabria (Spain)
Adolfo Cobo, Univ. de Cantabria (Spain)
Jose Miguel Lopez-Higuera, Univ. de Cantabria (Spain)

Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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