title: Coupling efficiency model for spectral beam combining of high-power fiber lasers calculated from spectrum.
abstract: We utilize the spectral broadening of Yb-doped fiber lasers in the spectral beam combining scheme to develop an analytical model of the coupling efficiency, which forms a critical factor in evaluating the practicality of the beam combination system. The simulation results predict a trend similar to the measured ones. Via increasing the number of simulating lasers, the model can be extended to calculate the combining efficiency of the resulting multiple-beam-combination system and estimate the optimal output power and combining efficiency. Moreover, the analytical model is suitable to investigate key parameters of Yb-doped lasers and filters, which is beneficial in enhancing the combining efficiency.
authors.forename: Fan
authors.initials: F
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.forename: Rihong
authors.initials: R
authors.lastname: Zhu
authors.forename: Qun
authors.initials: Q
authors.lastname: Yuan
authors.forename: Wenchao
authors.initials: W
authors.lastname: Zhou
authors.forename: Junhong
authors.initials: J
authors.lastname: Su
authors.forename: Junqi
authors.initials: J
authors.lastname: Xu
authors.forename: Shaohua
authors.initials: S
authors.lastname: Pan