title: Flat-plateau supercontinuum generation in liquid absorptive medium by femtosecond filamentation.
abstract: We have studied filamentation and supercontinuum generation by focusing the intense femtosecond laser pulses into an absorptive medium (CuSO(4) aqueous solution). A broad spectrum from 350 to 950 nm with a flat plateau spanning approximately from 450 to 700 nm with a flatness of 9% is obtained without any additional filters. The results indicate that the absorptive medium not only suppresses the strong surplus femtosecond laser signal but also flattens the supercontinuum spectrum efficiently.
authors.affiliation: Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Ya-Xian
authors.initials: YX
authors.lastname: Fan
authors.forename: Zhen-Dong
authors.initials: ZD
authors.lastname: Yan
authors.forename: Hui-Tian
authors.initials: HT
authors.lastname: Wang
authors.forename: Zhen-Lin
authors.initials: ZL
authors.lastname: Wang