title: Mid-infrared methane detection in a photonic bandgap fiber using a broadband optical parametric oscillator.
abstract: 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.
authors: L W
authors: LW
authors: Kornaszewski
authors: N
authors: N
authors: Gayraud
authors: J M
authors: JM
authors: Stone
authors: W N
authors: WN
authors: Macpherson
authors: A K
authors: AK
authors: George
authors: J C
authors: JC
authors: Knight
authors: D P
authors: DP
authors: Hand
authors: D T
authors: DT
authors: Reid