title: Passively mode-locked fiber laser based on a hollow-core photonic crystal fiber filled with few-layered graphene oxide solution.
abstract: We demonstrate a nanosecond-pulse erbium-doped fiber laser that is passively mode locked by a hollow-core photonic crystal fiber filled with few-layered graphene oxide solution. Owing to the good solution processing capability of few-layered graphene oxide, which can be filled into the core of a hollow-core photonic crystal fiber through a selective hole filling process, a graphene saturable absorber can be successfully fabricated. The output pulses obtained have a center wavelength, pulse width, and repetition rate of 1561.2 nm, 4.85 ns, and 7.68 MHz, respectively. This method provides a simple and efficient approach to integrate the graphene into the optical fiber system.
authors.affiliation: Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Liu
authors.forename: Xiaoying
authors.initials: X
authors.lastname: He
authors.forename: D N
authors.initials: DN
authors.lastname: Wang
mesh_terms: D000042:Absorption; D004871:Erbium / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D007834:Lasers; D010087:Oxides / Q000737:chemistry*; D017785:Photons; D012996:Solutions
chemical_list: D010087:Oxides; D012996:Solutions; D006108:Graphite; D004871:Erbium