13 May 2015 Near-infrared absorption fiber-optic sensors for ultra-sensitive CO2 detection
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We present a fiber-optic sensor working at near-infrared (NIR) wavelength (~1.57μm) for CO2 detection. In order to increase the NIR absorption, we utilize functional sensor materials metalorganic framework (MOF) on the surface of the core of a multimode-fiber with the cladding layer etched away. The selected functional materials demonstrated excellent adsorption capacity of CO2 and significantly increased the detection sensitivity down to 500 ppm with only 8-centimeter absorption length.
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Xinyuan Chong, Xinyuan Chong, Ki-Joong Kim, Ki-Joong Kim, Paul R. Ohodnicki, Paul R. Ohodnicki, Chih-Hung Chang, Chih-Hung Chang, Alan X. Wang, Alan X. Wang, "Near-infrared absorption fiber-optic sensors for ultra-sensitive CO2 detection", Proc. SPIE 9480, Fiber Optic Sensors and Applications XII, 94800W (13 May 2015); doi: 10.1117/12.2178072; https://doi.org/10.1117/12.2178072


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