▎ 摘　　要

We have experimentally obtained two different applied output states from an all-normal dispersion yetterbium-doped fiber laser using graphene-oxide as a saturable absorber without additional components (like tunable filter, dispersion compensation), including the wavelength-switched mode-locking operation, and the dissipative soliton resonance (DSR) operation with high energy square pulses. These two experimental phenomena indicate that the graphene-oxide saturable absorber can be successfully used to realize different mode-locking states in a fiber laser by system-parameter management. The yetterbium-doped fiber laser in all-normal dispersion with flexible outputs can meet different application needs.