CRDS investigation of line shapes of the nitrogen-broadened oxygen B-band transition

29th International Conference on Photonic, Electronic, and Atomic Collisions

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

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

87-100, Poland^1

关键词: Cavity ring down;    Collisional broadening;    Fitting techniques;    Line shape parameters;    Line-shape model;    Optical frequency combs;    Pound-Drever-Hall;    Speed dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/9/092109/pdf
DOI  :  10.1088/1742-6596/635/9/092109

来源: IOP

【 摘 要 】

We present precise line-shape measurements of the nitrogen-broadened P9 P9 oxygen B-band transition occurring near 689 nm. Data were obtained using the optical frequency comb-assisted Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer. Several line-shape models describing physical effects such as Dicke narrowing, the speed dependence of collisional broadening and shifting, and the correlation between velocity- and phase-changing collisions were used in the analysis. The multispectrum fitting technique is used to minimize correlation between line-shape parameters. Observed line narrowing is mostly determined by the speed dependence of the collisional broadening.