▎ 摘　　要

We report on pulse train generation in an erbium-doped fiber laser with atomic layer graphene-water solutions which are fabricated from graphite by wet-chemistry techniques. Pulse trains generated from various concentration of graphene-water solutions are investigated under different laser energy. Present results show that atomic layer graphene-water solutions could be a promising saturable absorber for pulse trains due to its wavelength-independent ultrafast saturable absorption, good processbility and low cost.