Water vapor absorption in the region of the oxygen A-band near 760 nm

Vasilchenko, S.; Михайленко, С.Н.; Campargue, A.

doi:10.1016/j.jqsrt.2021.107847

Cited by 23 publications

(22 citation statements)

References 28 publications

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“…[13] and Ref. [14] (blue and green dots, respectively) and present work (red open circles). The HITRAN2020 list [15] is plotted in the background (grey symbols).…”

Section: Figmentioning

confidence: 61%

“…The frequency calibration provided by the wavemeter was refined by shifting the whole spectrum in order to match accurate positions of water lines available in the region. Due to the lack of accurate measurements, the position of some reference lines of the region were calculated using accurate empirical values of the upper energy levels derived in [14]. The accuracy of the reference positions is estimated to 1×10 -3 cm -1 , which is thus the estimated accuracy of the frequency scale of the spectra.…”

Section: Methodsmentioning

confidence: 99%

“…Absorption lines are weak in this region with maximum intensity on the order of 10 -25 cm/molecule near 13400 cm -1 . Recently, using the same CRDS spectrometer [16] as used in the present work, recordings were dedicated to the lower part of the range (12970-13172 cm -1 ) [14]. This spectral interval corresponds to the A-band of oxygen of particular importance for atmospheric applications and interfering lines of atmospheric water vapor have to be accurately characterized.…”

Section: Figmentioning

confidence: 99%

“…Their description has been detailed in Ref. [14] and is not repeated here. Briefly, an external cavity diode laser (ECDL) from Sacher Lasertechnik, tunable in the 745-775 nm spectral range (12900-13400 cm -1 ) was used as radiation source.…”

Section: Figmentioning

confidence: 99%

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Cavity ring down spectroscopy of water vapour near 750 nm: a test of the HITRAN2020 and W2020 line lists

2022

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Cavity ring down spectroscopy (CRDS) is used to measure with unprecedented sensitivity and accuracy the weak water vapor spectrum in the 13171-13417 cm -1 region. A total of more than 1400 water lines are rovibrationally assigned to four isotopologues in natural isotopic abundance (H 2 16 O, H 2 18 O, H 2 17 O and HD 16 O), leading to the determination of 151 new levels and correction of 160 levels. The review of previous experimental works in the region is discussed. The comparison to the recent HITRAN2020 spectroscopic databases and to the W2020 line lists [Furtenbacher et al. J. Phys. Chem. Ref. Data 49 (2020) 043103; https://doi.org/10.1063/5.0030680] shows important discrepancies both for line positions and line intensities. A significant fraction of the W2020 line positions is inaccurate and shows deviations compared to measurements largely exceeding their claimed error bars. Line intensities are poorly predicted by available ab initio calculations in the considered region. A recommended line list mostly based on the present CRDS measurements is proposed.

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“…[13] and Ref. [14] (blue and green dots, respectively) and present work (red open circles). The HITRAN2020 list [15] is plotted in the background (grey symbols).…”

Section: Figmentioning

confidence: 61%

Section: Methodsmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

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Cavity ring down spectroscopy of water vapour near 750 nm: a test of the HITRAN2020 and W2020 line lists

2022

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“…This is particularly observable on the low frequency side of the spectrum, where the scanning speed is slower. Moreover, inaccuracies in the HITRAN parameters cannot be excluded in this spectral range of extremely low line intensities [49]. The black star in Figure 8c indicates a water line for which the discrepancies between the spectrum (in black) and the fit (in red) can be attributed to the HITRAN database.…”

Section: Resultsmentioning

confidence: 98%

Cavity-Enhanced Frequency Comb Vernier Spectroscopy

et al. 2022

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Vernier spectroscopy is a frequency comb-based technique employing optical cavities for filtering of the comb and for enhancement of the interaction length with the sample. Depending on the ratio of the cavity free spectral range and the comb repetition rate, the cavity transmits either widely spaced individual comb lines (comb-resolved Vernier spectroscopy) or groups of comb lines, called Vernier orders (continuous-filtering Vernier spectroscopy, CF-VS). The cavity filtering enables the use of low-resolution spectrometers to resolve the individual comb lines or Vernier orders. Vernier spectroscopy has been implemented using various near- and mid-infrared comb sources for applications ranging from trace gas detection to precision spectroscopy. Here, we present the principles of the technique and provide a review of previous demonstrations of comb-resolved and continuous-filtering Vernier spectroscopy. We also demonstrate two new implementations of CF-VS: one in the mid-infrared, based on a difference frequency generation comb source, with a new and more robust detection system design, and the other in the near-infrared, based on a Ti:sapphire laser, reaching high sensitivity and the fundamental resolution limit of the technique.

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