title: Double-wall carbon nanotubes for wide-band, ultrafast pulse generation.
abstract: We demonstrate wide-band ultrafast optical pulse generation at 1, 1.5, and 2 μm using a single-polymer composite saturable absorber based on double-wall carbon nanotubes (DWNTs). The freestanding optical quality polymer composite is prepared from nanotubes dispersed in water with poly(vinyl alcohol) as the host matrix. The composite is then integrated into ytterbium-, erbium-, and thulium-doped fiber laser cavities. Using this single DWNT-polymer composite, we achieve 4.85 ps, 532 fs, and 1.6 ps mode-locked pulses at 1066, 1559, and 1883 nm, respectively, highlighting the potential of DWNTs for wide-band ultrafast photonics.
authors.affiliation: Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom.
authors.forename: Tawfique
authors.initials: T
authors.lastname: Hasan
authors.forename: Zhipei
authors.initials: Z
authors.lastname: Sun
authors.forename: PingHeng
authors.initials: P
authors.lastname: Tan
authors.forename: Daniel
authors.initials: D
authors.lastname: Popa
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Flahaut
authors.forename: Edmund J R
authors.initials: EJ
authors.lastname: Kelleher
authors.forename: Francesco
authors.initials: F
authors.lastname: Bonaccorso
authors.forename: Fengqiu
authors.initials: F
authors.lastname: Wang
authors.forename: Zhe
authors.initials: Z
authors.lastname: Jiang
authors.forename: Felice
authors.initials: F
authors.lastname: Torrisi
authors.forename: Giulia
authors.initials: G
authors.lastname: Privitera
authors.forename: Valeria
authors.initials: V
authors.lastname: Nicolosi
authors.forename: Andrea C
authors.initials: AC
authors.lastname: Ferrari
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