Title :
Methane sensing at 1300 nm band with hollow-core photonic bandgap fibre as gas cell
Author :
Cubillas, A.M. ; Lazaro, J.M. ; Silva-Lopez, M. ; Conde, O.M. ; Petrovich, M.N. ; Lopez-Higuera, J.M.
Author_Institution :
Univ. de Cantabria, Santander
Abstract :
The feasibility of employing a hollow-core photonic bandgap fibre (HC-PBF) to measure methane concentrations below its lower explosive limit is assessed. Using a 5.6 m-long HC-PBF as gas cell, the spectrum of methane at v2 + 2v3 band at 1300 nm has been recorded and the Q-branch at 1331.55 nm selected for sensing purposes. A minimum detectivity of 49 ppmv-m for the system configuration is estimated.
Keywords :
fibre optic sensors; gas sensors; photonic band gap; Q-branch; gas cell; hollow-core photonic bandgap fibre; methane concentrations measurement; methane sensing;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20080166
