title: Generation of 120-fs laser pulses at 1-GHz repetition rate derived from continuous wave laser diode.
abstract: We report the first demonstration of continuous-wave laser diode based 100-fs-class pulse lasers operating at a gigahertz repetition rate without a mode-locking technique. We describe the performance of a 1-W, 120-fs optical pulse train at 1 GHz and a 1-W, 80-fs optical pulse train at 250 MHz by using a simple configuration. Sub-100-fs pulse durations are achieved by using a progressive expansion of the spectrum in the self-phase modulation process in an erbium-doped fibre amplifier. Our scheme can achieve continuously tunable repetition rate in the range of ± 20%, and develop powerful tools for use in nanomechanical systems and nanobiotechnology.
authors: NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 243-0198, Japan. ishizawa.atsushi@lab.ntt.co.jp
authors: Atsushi
authors: A
authors: Ishizawa
authors: Tadashi
authors: T
authors: Nishikawa
authors: Akira
authors: A
authors: Mizutori
authors: Hidehiko
authors: H
authors: Takara
authors: Hidetoshi
authors: H
authors: Nakano
authors: Tetsuomi
authors: T
authors: Sogawa
authors: Atsushi
authors: A
authors: Takada
authors: Masafumi
authors: M
authors: Koga
mesh_terms: D004871:Erbium / Q000737:chemistry; D005898:Glass / Q000737:chemistry; D054023:Lasers, Semiconductor; D055095:Optics and Photonics; D013997:Time Factors
chemical_list: D004871:Erbium