Active FTIR-based stand-off spectroscopy using a femtosecond optical parametric oscillator.

@article{Zhang2014ActiveFS,
  title={Active FTIR-based stand-off spectroscopy using a femtosecond optical parametric oscillator.},
  author={Zhaowei Zhang and Rhea J. Clewes and Christopher R. Howle and Derryck Telford Reid},
  journal={Optics letters},
  year={2014},
  volume={39 20},
  pages={6005-8}
}
We presented the first demonstration of stand-off Fourier transform infrared (FTIR) spectroscopy using a broadband mid-infrared optical parametric oscillator, with spectral coverage over 2700-3200  cm⁻¹. For vapor-phase water and nitromethane (NM), stand-off spectra was recorded using a concrete target at from 1-m to 2-m range and showed good agreement with reference spectra, and in NM a normalized detection sensitivity of 15  ppm·m·Hz(-1/2) was obtained. Spectra from 50-μL droplets of liquid… CONTINUE READING