title: Graphene Q-switched 2.78 μm Er3+-doped fluoride fiber laser.
abstract: We report a diode-pumped 2.78 μm Er3+-doped ZBLAN fiber laser passively Q switched by a graphene saturable absorber, which was directly deposited onto a fiber dichroic mirror by the method of optically driven deposition. Stable Q-switched operation with a pulse duration of 2.9 μs and a pulse energy of 1.67 μJ was achieved in a 10 m long gain fiber. The pulse duration was reduced to 1 μs when the gain fiber length was shortened to 2 m. This Letter demonstrates that graphene is a promising and reliable saturable absorber for mid-infrared pulse generation at 3 μm.
authors.affiliation: College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA.
authors.forename: Chen
authors.initials: C
authors.lastname: Wei
authors.forename: Xiushan
authors.initials: X
authors.lastname: Zhu
authors.forename: F
authors.initials: F
authors.lastname: Wang
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: Kaushik
authors.initials: K
authors.lastname: Balakrishnan
authors.forename: Feng
authors.initials: F
authors.lastname: Song
authors.forename: Robert A
authors.initials: RA
authors.lastname: Norwood
authors.forename: N
authors.initials: N
authors.lastname: Peyghambarian