title: High-speed ultrashort pulse fiber ring laser using charcoal nanoparticles.
abstract: A mode-locked erbium-doped fiber ring laser that is easy to set up is proposed and experimentally demonstrated to generate a high-repetition-rate optical pulse train with an ultrashort pulse width. The laser combines a rational harmonic mode-locking technique and charcoal nanoparticles as saturable absorbers. Compared to a solely active mode-locking scheme, the scheme with charcoal nanoparticles can remove the supermodes and narrow the pulse width by a factor of 0.57 at a repetition rate of 20 GHz. Numerical simulation of the laser performance is also provided, which shows good agreement with the experimental results.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Li
authors.forename: Hongyu
authors.initials: H
authors.lastname: Hu
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhang
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhao
authors.forename: Kan
authors.initials: K
authors.lastname: Fu
authors.forename: Niloy K
authors.initials: NK
authors.lastname: Dutta