Spectral attenuation of a 400-nm laser pulse propagating through a plasma filament induced by an intense femtosecond laser pulse*
Project supported by the National Natural Science Foundation of China (Grant Nos. U1932133, 51733004, 51525303, and 21702085) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. lzujbky-2016-35 and lzujbky-2018-it36).
Wang Quan-Jun1, Chen Rao1, Zhao Jia-Chen1, Sun Chun-Lin2, Wang Xiao-Zhen2, Ding Jing-Jie1, Liu Zuo-Ye1, †, Hu Bi-Tao1
(a) The dependence of the 400-nm pulse energy on the pump–probe time delay τ. Negative time delay means the 400-nm pulse is in front of the pump pulse. (b) Typical fluorescence spectra of the interaction area with the 400-nm pulse (blue dot line), plasma filament (red dash line), and both the 400-nm pulse and the plasma filament (black solid line). The energy of pump pulse is 2.7 mJ and the time delay τ is 200 fs.
