This paper proposes a novel way for controlling the generation of the dissipative bright soliton and dark soliton operation of lasers.\nWe observe the generation of dissipative bright and dark soliton in an all-normal dispersion fiber laser by employing the nonlinear\npolarization rotation (NPR) technique.Through adjusting the angle of the polarizer and analyzer, the mode-locked and non-modelocked\nregions can be obtained in different polarization directions.Numerical simulation shows that, in an appropriate pump power\nrange, the dissipative bright soliton and dark soliton can be generated simultaneously in the mode-locked and non-mode-locked\nregions, respectively. If the pump power exceeds the top limit of this range, only dissipative soliton will exist, whereas if it is below\nthe lower bound of this range, only dark soliton will exist.
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