title: A passively mode-locked femtosecond soliton fiber laser at 1.5 microm with a CNT-doped polycarbonate saturable absorber.
abstract: We report a new 1.5 mum femtosecond fiber soliton laser incorporating a polymer saturable absorber that consists of polycarbonate (PC) with carbon nanotubes (CNTs). We installed the polymer in a fiber laser with a cavity length of 5.1 m, in which an erbium-doped fiber was used as the gain medium. Stable passive mode-locking was achieved for a pump power of 303 mW at 39 MHz, and a pulse width of 115 fs with an average output power of 3.4 mW was obtained.
authors.affiliation: Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577 Japan. f-shohda@riec.tohoku.ac.jp
authors.forename: Fumio
authors.initials: F
authors.lastname: Shohda
authors.forename: Takafumi
authors.initials: T
authors.lastname: Shirato
authors.forename: Masataka
authors.initials: M
authors.lastname: Nakazawa
authors.forename: Kyoji
authors.initials: K
authors.lastname: Komatsu
authors.forename: Toshikuni
authors.initials: T
authors.lastname: Kaino