▎ 摘　　要

In this letter, we present an experimental observation of four-wave-mixing (FWM)-based wavelength conversion in an all-fiber configuration by a thin film of mechanically exfoliated graphene. In addition, using the optical deposition method, we fabricate carbon nanotube and graphene thin film and compare the third-order nonlinearity of three types of nanomaterials-based nonlinear devices by FWM.