Methane detection at 1670-nm band using a hollow-core photonic bandgap fiber and a multiline algorithm.
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.
Cubillas
A M
AM
Grupo de Ingeniería Fotónica, Dpto. TEISA, Universidad de Cantabria, Avda. Los Castros S/N, C.P. 39005 Santander, Spain. cubillasam@unican.es
Silva-Lopez
M
M
Lazaro
J M
JM
Conde
O M
OM
Petrovich
M N
MN
Lopez-Higuera
J M
JM
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
D008697:Methane