The　nonlinear　optical　(NLO)　and　optical　limiting　(OL)　properties　of　graphene　families,　including　graphene　oxide　nanosheets,　graphene　nanosheets　(GNSs),　graphene　oxide　nanoribbons　(GONRs),　and　graphene　nanoribbons　(GNRs),　were　investigated　at　532　and　1064　nm　using　a　nanosecond　regime.　GNSs,　GONRs,　and　GNRs　exhibited　broadband　NLO　and　OL　properties.　Reduced　graphene　samples　exhibited　stronger　NLO　and　OL　responses　than　their　graphene　oxide　precursors　because　of　their　increased　crystallinity　and　conjugation.　Nonlinear　scattering　and　two-photon-absorption　were　found　to　have　strong　effects　on　the　NLO　and　OL　responses　of　the　graphene　nanostructures.