title: Methane detection at 1670-nm band using a hollow-core photonic bandgap fiber and a multiline algorithm.
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.
authors: Grupo de Ingeniería Fotónica, Dpto. TEISA, Universidad de Cantabria, Avda. Los Castros S/N, C.P. 39005 Santander, Spain. cubillasam@unican.es
authors: A M
authors: AM
authors: Cubillas
authors: M
authors: M
authors: Silva-Lopez
authors: J M
authors: JM
authors: Lazaro
authors: O M
authors: OM
authors: Conde
authors: M N
authors: MN
authors: Petrovich
authors: J M
authors: JM
authors: Lopez-Higuera
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology; D008697:Methane / Q000032:analysis*; D017785:Photons; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods*; D014159:Transducers
chemical_list: D008697:Methane