Sensing system with fiber gas sensor

Details Sensing system with fiber gas sensor Sensing system with fiber gas sensor

2008-03-28

2009-02-10

Peng, Charlie (Department: 2883)

Optical waveguides

Optical waveguide sensor

Reexamination Certificate

active

07489835

ABSTRACT:
A fiber gas sensor includes a fiber core with first and second refractive index periodic modulated grating structures having different amplitude modulation profiles positioned about the fiber core. A fiber cladding is positioned about the first and second refractive index periodic modulated grating structures. A sensing layer is positioned about the fiber cladding of one of the refractive index periodic modulated grating structures. The sensing layer includes a sensing material made of a Pd-based alloy, such as nano-PdOx, nano-Pd(x)Au(y)Ni(1-x-y) or nano-Pd/Au/WOx. The fiber gas sensor provides a measurement of localized, temperature-corrected gas concentration and composition from a combustion environment. A reflection-based or a transmission-based sensing system with an array of one or more fiber gas sensors is also described.

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patent: 6535658 (2003-03-01), Mendoza et al.
patent: 7151872 (2006-12-01), Xia et al.
patent: 2005/0169807 (2005-08-01), Carpenter et al.
patent: 2006/0215959 (2006-09-01), McCarthy et al.

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