Mid-infrared methane detection in a photonic bandgap fiber using a broadband optical parametric oscillator.
We demonstrate methane sensing using a photonic bandgap fiber-based gas cell and broadband idler pulses from a periodically-poled lithium niobate femtosecond optical parametric oscillator. The hollow core of the fiber was filled with a methane:nitrogen mixture, and Fourier transform spectroscopy was used to measure transmission spectra in the 3.15-3.35 mum methane absorption region. The method has applications in gas sensing for remote or hazardous environments and potentially at very low concentrations.
Kornaszewski
L W
LW
Gayraud
N
N
Stone
J M
JM
Macpherson
W N
WN
George
A K
AK
Knight
J C
JC
Hand
D P
DP
Reid
D T
DT