Data for the manuscript entitled "Leveraging resonant frequencies of an optical cavity for spectroscopic measurement of gas temperature and concentration"

Data set related to the publication D. Lisak et al. "Leveraging resonant frequencies of an optical cavity for spectroscopic measurement of gas temperature and concentration" Phys. Rev. Lett. (2025).Link to related publication: https://doi.org/10.1103/2jz1-dr5lDOI: 10.1103/2jz1-dr5lThe author accepted manuscript is also available on arXiv: https://arxiv.org/abs/2502.17660The data is available under a CC BY 4.0 license.Raw spectroscopic data were collected in 2023 at temperature 296 K and pressures between 0.05 and 20 kPa using the Pound–Drever–Hall locked, frequency-stabilized cavity enhanced spectrometer. Part of the data were refrenced to the optical frequency comb. The cavity mode-dispersion spectroscopy (CMDS) technique was used to measure the transitions from the carbon monoxide (3-0) band. Deposited data were created in 2025.Deposited data:Data_T_LRT.csv - file with the differences, (T_LRT - T_C)/K, between temperatures from LRT, T_LRT, and the gas temperature from a contact thermometer, T_C, of 296.00(3) K obtained for spectral lines of CO (3-0) band line pairs having line indexes m1 and m2. This data was used in Fig. 3 of the related publication.Data_n_spec.csv - file with the ratios, n_sp/n_meas, of gas concentrations obtained from spectroscopy, n_sp, and from the reference gas pressure and temperature measurements, n_meas, for various gas pressures, p_meas and spectral line used denoted by line index m. This data was used in Fig. 4 of the related publication.