title: Spectral broadening in high-power Yb-doped fiber lasers employing narrow-linewidth multilongitudinal-mode oscillators.
abstract: High-power continuous wave fiber lasers with narrow linewidths are required for spectral beam combining systems. A 2.9 kW Yb-doped fiber laser with an output linewidth as narrow as 0.31 nm employing a narrow-linewidth multilongitudinal-mode oscillator is experimentally demonstrated. The numerical simulations reveal that the spectral broadening of the bandwidth grows almost linearly with injected mode number, which provides a potential way to further suppress the nonlinear spectral broadening in high-power fiber lasers.
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Huang
authors.forename: Xiaobao
authors.initials: X
authors.lastname: Liang
authors.forename: Chengyu
authors.initials: C
authors.lastname: Li
authors.forename: Honghuan
authors.initials: H
authors.lastname: Lin
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
authors.forename: Jianjun
authors.initials: J
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Jing