Ultrafast mode-locked fiber laser with Zirconium disulfide on D-shaped Fiber

Abstract Transition-metal dichalcogenides (TMDs), as highly anisotropic layered compounds, have attracted increasing interest from basic research to practical applications. Among them, zirconium disulfide (ZrS2) with remarkable physical properties has been widely investigated recently. Here, ZrS2 employed as a saturable absorber is utilized in an Er-doped fiber laser. A stable mode-locking operation is achieved, with central wavelength of ∼1559.5 nm, 3 dB bandwidth of ∼1.72 nm, and pulse duration of ∼1.75 ps. These results make ZrS2 an appealing candidate for generating ultrafast laser pulses.