Fig. 1. (Color online) (a) XRD and (b) Raman spectrum of bulk Bi2Se3 and few-layer Bi2Se3, (c) height profile of an as-arranged few-layer Bi2Se3 sample. Inset: AFM image.

Fig. 2. (a) Schematic of the laser experimental setup of Nd3+ glass passively QS, transmission curves of the fiber mirror (b) M1 and (c) M2.

Fig. 3. (Color online) Output powers as a function of pump powers in CW and QS regimes.

Fig. 4. Output optical spectra of dual-wavelength all-fiber laser at 1065.8 and 1074.3 nm, operating in (a) CW and (b) QS regime, respectively.

Fig. 5. Output pulse trains under different pump powers at (a) PP = 80, (b) PP = 140, (c) PP = 170, and (d) PP=240  mW.

Fig. 6. The pump power at 140 mW of (a) single pulse time duration of a QS laser. Inset: QS pulse trains at a same pump power. (b) RF output spectrum.

Fig. 7. (Color online) (a) Repetition rate and the pulse duration as a function of the pump power. (b) The output power and the pulse energy as a function of the pump power.