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29 April 2009 Nanocrystalline Cu-doped zirconia film-coated long-period fiber grating for CO monitoring at high temperature
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Abstract
Dense nanocrystalline copper-doped zirconia (CDZ, Cu:Zr=16:84) thin film was coated on the surface of a 125 μm-diameter long-period fiber grating (LPFG) by a facile synthesis route involving polymeric precursor coating and subsequent thermal treatments. The CDZ film had a uniform thickness of ~100 nm and grain size of 20 to 35 nm after a brief annealing step at 700°C for 1 hour. This CDZ thin film coated LPFG (CDZ-LPFG) was evaluated at a high temperature of 550°C for its change of resonant wavelength (λR) in response to the variation of carbon monoxide (CO) concentration in nitrogen (N2). The λR was found to shift toward longer wavelength when increasing the CO concentration. The CDZ-LPFG sensor response was found to be reproducible and reversible at low level CO concentrations (<1,000 ppm) but became irreversible when the CO concentration was high (e.g. at 10,000 ppm). The high temperature stability of the CDZ material in CO-containing atmospheres was studied to understand the limit of CO measurement range.
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Xiling Tang, Jian Zhang, Junhang Dong, Tao Wei, and Hai Xiao "Nanocrystalline Cu-doped zirconia film-coated long-period fiber grating for CO monitoring at high temperature", Proc. SPIE 7322, Photonic Microdevices/Microstructures for Sensing, 73220C (29 April 2009); https://doi.org/10.1117/12.819016
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