Generation of few-cycle laser pulses: Comparison between atomic and molecular gases in a hollow-core fiber

Huang Zhi-Yuan^{1, 2}, Dai Ye¹, Zhao Rui-Rui², Wang Ding^{2, †,}, Leng Yu-Xin^{2, ‡,}

(a) and (d) The probe pulses duration compensated by different glass lengths. (b) and (e) The temporal intensities of the compressed probe pulses. (c) and (f) The spectral intensities (green solid lines), the phase before (blue and red solid lines) and after (black dotted lines) compensation. Panels (a)–(c) and (d)–(f) correspond to various time delays 4.27 ps and 8.34 ps, respectively.