Generation of few-cycle laser pulses: Comparison between atomic and molecular gases in a hollow-core fiber
Huang Zhi-Yuan1, 2, Dai Ye1, Zhao Rui-Rui2, Wang Ding2, †, , Leng Yu-Xin2, ‡,
       

(a) and (d) The spectral broadening factor (blue circle lines) and the pulse FWHM only using GDD (blue right triangle lines) or GDD, TOD (red left triangle lines) compensation of the compressed pulses with different gas pressures. (b) and (e) The temporal profiles of output pulses (blue solid lines), compressed pulses with GDD (red solid lines) or GDD, TOD compensation (black-dotted lines) for various gas pressures 0.5 bar and 0.8 bar, respectively. (c) and (f) The corresponding spectral intensities (green solid lines) and phase.