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 (c) The spectral profiles of output pulses. (b) and (d) The evolutions of spectral intensities in HCF with initial energy 0.2 mJ. Panels (a), (b) and (c), (d) correspond to time delays 4.14 ps and 4.27 ps. Green and yellow solid lines represent different pulse energies 0.1 mJ and 0.2 mJ, respectively.