Fast, real-time spectrometer based on a pulsed quantum-cascade laser.

  title={Fast, real-time spectrometer based on a pulsed quantum-cascade laser.},
  author={Elise Normand and M. T. McCulloch and Geoffrey Duxbury and Nigel Langford},
  journal={Optics letters},
  volume={28 1},
We describe a mid-infrared spectrometer that is based on the combination of a multiple-pass absorption cell and a submicrosecond pulsed quantum-cascade laser. The spectrometer is capable of both making sensitive measurements and providing a real-time display of the spectral fingerprint of molecular vapors. For a cell with a path length of 9.6 m, dilution measurements made of the nu9 band transitions of 1,1-difluoroethylene indicate a sensitivity of 500 parts in 10(9), corresponding to a… CONTINUE READING

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