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- W3020242989 abstract "Abstract Four-wave-mixing-based quantum cascade laser frequency combs (QCL-FC) are a powerful photonic tool, driving a recent revolution in major molecular fingerprint regions, i.e. mid- and far-infrared domains. Their compact and frequency-agile design, together with their high optical power and spectral purity, promise to deliver an all-in-one source for the most challenging spectroscopic applications. Here, we demonstrate a metrological-grade hybrid dual comb spectrometer, combining the advantages of a THz QCL-FC with the accuracy and absolute frequency referencing provided by a free-standing, optically-rectified THz frequency comb. A proof-of-principle application to methanol molecular transitions is presented. The multi-heterodyne molecular spectra retrieved provide state-of-the-art results in line-center determination, achieving the same precision as currently available molecular databases. The devised setup provides a solid platform for a new generation of THz spectrometers, paving the way to more refined and sophisticated systems exploiting full phase control of QCL-FCs, or Doppler-free spectroscopic schemes." @default.
- W3020242989 created "2020-05-01" @default.
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- W3020242989 date "2020-04-24" @default.
- W3020242989 modified "2023-10-17" @default.
- W3020242989 title "Quantum cascade laser based hybrid dual comb spectrometer" @default.
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- W3020242989 doi "https://doi.org/10.1038/s42005-020-0344-0" @default.
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