Spectral line-shapes of oxygen B-band transitions measured with cavity ring-down spectroscopy

22nd International Conference on Spectral Line Shapes

Wójtewicz, S.^1 ; Cygan, A.^1 ; Maslowski, P.^1 ; Domyslawska, J.^1 ; Wcislo, P.^1 ; Zaborowski, M.^1 ; Lisak, D.^1 ; Trawiski, R.S.^1 ; Ciurylo, R.^1

Institute of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University, Grudziadzka 5, Torun

87-100, Poland^1

关键词: Cavity ring down spectroscopies;    Collisional broadening;    Fitting techniques;    Line shape analysis;    Line shape parameters;    Numerical correlations;    Optical frequency combs;    Spectral line shape;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/548/1/012028/pdf
DOI  :  10.1088/1742-6596/548/1/012028

来源: IOP

【 摘 要 】

Results of line-shape measurements of self- and N2-broadened P9 P9 transition of the oxygen B band are presented. Spectra were acquired using the optical frequency comb- assisted Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer (PDH- locked FS-CRDS). In the line-shape analysis the line narrowing described by Dicke narrowing or/and the speed dependence of collisional broadening were taken into account. The multispectrum fitting technique was used to minimize numerical correlations between line-shape parameters. Collisional broadening and shifting coefficients are reported with sub-percent uncertainties. Influence of the spectral line-shape model used in data analysis on determined line intensities and collisional broadening is discussed.