【摘要】：We investigated the nonlinear optical properties of ReSe_2. First, we measured the nonlinear absorption coefficient and the nonlinear refractive index of a ReSe_2 thin film using open-aperture(OA) and closed-aperture(CA) Z-scan techniques. ReSe_2 was shown to possess both saturable absorption and self-defocusing properties. The nonlinear absorption coefficient of ReSe_2 was measured to be-5.67-0.35×10~3 cm∕GW, and its nonlinear refractive index was-2.81-0.13×10~(-2) cm~2∕GW at 1560 nm. Next, a fiberized saturable absorber(SA) based on ReSe_2 was fabricated with a side-polished fiber platform and was tested as an ultrafast mode-locker capable of producing femtosecond pulses operating at a wavelength of 1560 nm. The estimated modulation depth and saturation power are ~3.9% and ~42 W, respectively, for the transverse electric mode, while they are ~2.4% and ~53 W for the transverse magnetic mode. Using the prepared SA, stable soliton pulses with a temporal width of ~862 fs were produced from an erbium-doped fiber ring cavity. To the best of the authors' knowledge, this is the first demonstration of using a ReSe_2-based SA for femtosecond mode-locked pulse generation.