Fourier Transform Spectrometry

By S. Davis, M. Abrams, J. Brault. 2001

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Spectroscopy of the methane {nu}{sub 3} band with an accurate midinfrared coherent dual-comb spectrometer (2011, methodology): “By comparison to saturated absorption spectroscopy of the P(6) and P(7) manifolds [5, 21, 22], we find a systematic uncertainty of ~300 kHz (10−5 cm−1), or ~1 part per thousand of the Doppler broadened li width and a tenfold higher accuracy than previous FTIR data.”
Cavity-enhanced direct frequency comb spectroscopy (2008, background): “This subtraction doubles the useful signal compared to a single interferometer output (due to the fact that the two output signals of the interferometer are complementary [187]) while removing common mode amplitude noise, mainly caused by FM-to-AM conversion by the enhancement cavity.”
Building the COllaborative Carbon Column Observing Network (COCCON): long-term stability and ensemble performance of the EM27/SUN Fourier transform spectrometer (2018, methodology): “thermore, the recorded interferograms are Fourier transformed using the Norton-Beer-Medium apodisation function (Davis et al., 2010).”
Coherent dual-comb spectroscopy at high signal-to-noise ratio (2010, background): “r than a part in 1017 has been demonstrated [14]). Assuming the comb teeth can be isolated with high fidelity one achieves a 2-8 order of magnitude improvement in accuracy over a state-of-the-art FTS [15]. Second, since the frequency resolution is set by the comb repetition rates, rather than a scan”