Numerical analysis of Ybdoped doubleclad fiber lasers

Numerical analysis for Ybdoped doubleclad fiber lasers is carried out. The simulative results include dependence of laser output power on pump power, fiber length, output mirror reflectivity and the differences of output performance for the cases of oneend and twoend pumps. The fiber laser experiment has been performed in the case of twoend open cavity. When incident pump power was 8.84W, the output power of 3.16W was attained with coupling efficiency of 77% and slope efficiency 375%. The experimental data are in agreement with numerical analysis results.