Mid-infrared continuous-filtering Vernier spectroscopy using a doubly resonant optical parametric oscillator

@article{Khodabakhsh2017MidinfraredCV,
  title={Mid-infrared continuous-filtering Vernier spectroscopy using a doubly resonant optical parametric oscillator},
  author={Amir Khodabakhsh and Lucile Rutkowski and J'erome Morville and Aleksandra Foltynowicz},
  journal={Applied Physics B},
  year={2017},
  volume={123},
  pages={1-12}
}
We present a continuous-filtering Vernier spectrometer operating in the 3.15–3.4 µm range, based on a femtosecond doubly resonant optical parametric oscillator, a cavity with a finesse of 340, a grating mounted on a galvo scanner, and two photodiodes. The spectrometer allows acquisition of one spectrum spanning 250 nm of bandwidth in 25 ms with 8 GHz resolution, sufficient to detect molecular lines at atmospheric pressure. An active lock ensures good frequency and intensity stability of the… 

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