Intense supercontinuum generation in the near-ultraviolet range from a 400-nm femtosecond laser filament array in fused silica

Li Dongwei¹, Zhang Lanzhi¹, Zafar Saba¹, Song He¹, Hao Zuoqiang^{1, †}, Xi Tingting^{2, ‡}, Gao Xun¹, Lin Jingquan¹

(color online) (a) SC spectrum plotted in logarithmic scale (arbitrary units) and (b) corresponding conversion efficiency generated by 400 nm laser filamentation as a function of separation distance between MLA and fused silica. The laser pulse energy of 870 μJ was used.