Transition metal sulfide saturable absorption mirror and mode locking fiber laser

The invention relates to the laser technical field, and especially relates to a transition metal sulfide saturable absorption mirror and a mode locking fiber laser; the transition metal sulfide saturable absorption mirror comprises a fiber, a transition metal sulfide film coated on an end face of the fiber, and a high reflective film coated on the transition metal sulfide film. The transition metal sulfide saturable absorption mirror is high in damage threshold, simple in structure, low in cost, high in reliability, and suitable for batch production; in addition, the mode locking fiber laser employing the transition metal sulfide saturable absorption mirror can realize all fiberization, is high in reliability, and suitable for accomplishment conversion.