title: Composite chromium and graphene oxide as saturable absorber in ytterbium-doped Q-switched fiber lasers.
abstract: In recent years, graphene and its compounds (e.g., oxides) have been used as saturable absorbers in passive Q-switched and mode-locked lasers, leading to the fabrication of compact pulsed fiber lasers. In this article, we study the operation of a Q-switched ytterbium-doped fiber ring laser based on a composite saturable absorber made of graphene oxide and chromium. We show that the addition of a thin layer of chromium can lead to pulse durations ranging from 3.5 to 9.4 μs and subsequently increasing the laser peak power.
authors.forename: Liming
authors.initials: L
authors.lastname: Liu
authors.forename: Haroldo T
authors.initials: HT
authors.lastname: Hattori
authors.forename: Evgeny G
authors.initials: EG
authors.lastname: Mironov
authors.forename: Abdul
authors.initials: A
authors.lastname: Khaleque