title: Beam coupling in 2x2waveguide arrays in fused silica fabricated by femtosecond laser pulses.
abstract: We demonstrate the coupling of a 2x2 waveguide array produced by a femtosecond laser in fused silica. The coupling constants of the waveguide array are obtained by measuring the ratio of output power of each waveguide by the coupled-mode theory. The variation of the coupled power between four waveguides as a function of the propagation distance is investigated experimentally and theoretically.
authors.forename: Hongyun
authors.initials: H
authors.lastname: Chen
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Chen
authors.forename: Yuxing
authors.initials: Y
authors.lastname: Xia
authors.forename: Dayong
authors.initials: D
authors.lastname: Liu
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong