Mid-infrared gas sensing using a photonic bandgap fiber.

  title={Mid-infrared gas sensing using a photonic bandgap fiber.},
  author={Nicolas Gayraud and Ukasz W Kornaszewski and James M. Stone and J. C. Knight and Derryck Telford Reid and Duncan P. Hand and William N Macpherson},
  journal={Applied optics},
  volume={47 9},
We demonstrate methane sensing based on Fourier transform infrared spectroscopy using a hollow-core photonic bandgap fiber guiding in the mid-infrared and idler pulses from a femtosecond optical parametric oscillator. Transmission measurements are presented for several fibers, and sensing is demonstrated using a fiber whose bandgap overlaps the methane… CONTINUE READING