MoxTa(1-x)Se2 ultrafast fiber laser

Ternary transition metal chalcogenides (TTMCs) are emerging as a promising branch of two-dimensional (2D) materials due to their special layered structure as well as wide-range tunable bandgap properties, which permit the implementation of novel optoelectronic characteristics. The manifestation of nonlinear optical properties of MoxTa(1-x)Se2 nanosheets and their application in ultrafast erbium-doped fiber (EDF) laser is reported in this work. The MoxTa(1-x)Se2 nanosheets were fabricated by employing the liquid phase exfoliation technology. In addition, the saturable absorption property of MoxTa(1-x)Se2-based saturable absorber (SA) is illustrated by obtaining a large optical modulation depth of 32.01 (0.76)%. Furthermore, an operational ultrashort pulse fiber laser was demonstrated. The laser has the ability to emit ultrashort pulses of 377 (0.3) fs at 1532 nm while a maximum output power of 10.52 mW was delivered by the employed within the EDF cavity MoxTa(1-x)Se2-based SA. Our experimental results provide concrete pieces of evidence that the MoxTa(1-x)Se2 nanosheets exhibit third-order optical nonlinearity and the significant potential in nonlinear optoelectronic devices.