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Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers
Published on: May 5, 2016
Methane detection at 1670-nm band using a hollow-core photonic bandgap fiber and a multiline algorithm
A M Cubillas1, M Silva-Lopez, J M Lazaro
1Grupo de Ingeniería Fotónica, Dpto. TEISA, Universidad de Cantabria, Avda. Los Castros S/N, C.P. 39005 Santander, Spain. cubillasam@unican.es
Abstract:
The long interaction pathlengths provided by hollow-core photonic bandgap fibers (HC-PBFs) are especially advantageous for the detection of weakly absorbing gases such as methane (CH(4)). In this paper, we demonstrate methane sensing with a 1670-nm band HC-PBF. A multiline algorithm is used to fit the R(6) manifold (near 1645 nm) and, in this way, to measure the gas concentration. With this method, a minimum detectivity of 10 ppmv for the system configuration was estimated.
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