title: Graphene-filled hollow optical fiber saturable absorber for efficient soliton fiber laser mode-locking.
abstract: We demonstrate a novel in-line saturable absorber based on hollow optical fiber (HOF) filled with graphene composite for high power operation of mode-locked fiber laser. Evanescent field of guided mode propagating in few centimeter-long HOF interacts with the graphene/polyvinyl acetate (PVAc) composite, which enables robust and efficient nonlinear absorption leading to stable passive mode-locking. The mode-locked fiber laser generates soliton pulses with 5.9-nm spectral bandwidth and its maximum output power is measured up to 80 mW. We also observe passive harmonic mode-locking of soliton laser delivering stable pulses with a repetition rate of 506.9 MHz at 33rd harmonics.
authors.affiliation: Division of Energy Systems Research, Ajou University, 443-749 Suwon, South Korea.
authors.forename: Sun Young
authors.initials: SY
authors.lastname: Choi
authors.forename: Dae Kun
authors.initials: DK
authors.lastname: Cho
authors.forename: Yong-Won
authors.initials: YW
authors.lastname: Song
authors.forename: Kyunghwan
authors.initials: K
authors.lastname: Oh
authors.forename: Kihong
authors.initials: K
authors.lastname: Kim
authors.forename: Fabian
authors.initials: F
authors.lastname: Rotermund
authors.forename: Dong-Il
authors.initials: DI
authors.lastname: Yeom
mesh_terms: D000042:Absorption; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007834:Lasers; D055100:Optical Fibers
chemical_list: D006108:Graphite