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Proceedings Paper

Optical fiber evanescent absorption sensors for high-temperature gas sensing in advanced coal-fired power plants
Author(s): Michael P. Buric; Paul R. Ohodnicky; Janice Duy
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Paper Abstract

Modern advanced energy systems such as coal-fired power plants, gasifiers, or similar infrastructure present some of the most challenging harsh environments for sensors. The power industry would benefit from new, ultra-high temperature devices capable of surviving in hot and corrosive environments for embedded sensing at the highest value locations. For these applications, we are currently exploring optical fiber evanescent wave absorption spectroscopy (EWAS) based sensors consisting of high temperature core materials integrated with novel high temperature gas sensitive cladding materials. Mathematical simulations can be used to assist in sensor development efforts, and we describe a simulation code that assumes a single thick cladding layer with gas sensitive optical constants. Recent work has demonstrated that Au nanoparticle-incorporated metal oxides show a potentially useful response for high temperature optical gas sensing applications through the sensitivity of the localized surface plasmon resonance absorption peak to ambient atmospheric conditions. Hence, the simulation code has been applied to understand how such a response can be exploited in an optical fiber based EWAS sensor configuration. We demonstrate that interrogation can be used to optimize the sensing response in such materials.

Paper Details

Date Published: 15 October 2012
PDF: 14 pages
Proc. SPIE 8463, Nanoengineering: Fabrication, Properties, Optics, and Devices IX, 84630D (15 October 2012); doi: 10.1117/12.930015
Show Author Affiliations
Michael P. Buric, National Energy Technology Lab. (United States)
Paul R. Ohodnicky, National Energy Technology Lab. (United States)
Janice Duy, National Energy Technology Lab. (United States)

Published in SPIE Proceedings Vol. 8463:
Nanoengineering: Fabrication, Properties, Optics, and Devices IX
Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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