Mid-infrared dual-comb spectroscopy with an optical parametric oscillator.

@article{Zhang2013MidinfraredDS,
  title={Mid-infrared dual-comb spectroscopy with an optical parametric oscillator.},
  author={Zhaowei Zhang and Tom Gardiner and Derryck Telford Reid},
  journal={Optics letters},
  year={2013},
  volume={38 16},
  pages={
          3148-50
        }
}
We present the first implementation of mid-infrared dual-comb spectroscopy with an optical parametric oscillator. Methane absorption spectroscopy was demonstrated with a resolution of 0.2 cm(-1) (5 GHz) at an acquisition time of ~10.4 ms over a spectral coverage at 2900-3050 cm(-1). The average power from each individual mid-infrared comb line was ~1 μW, representing a power level much greater than typical difference-frequency-generation sources. Mid-infrared dual-comb spectroscopy opens up… 
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