Fig. 1. The growth and characterization of PbSe crystal

Fig. 2. The characterization of PbSe nanosheets

Fig. 3. the property of PbSe nanosheets

Fig. 4. Experimental setup of the PbSe-SA pulse fiber laser

Fig. 5. Performance of the pulse laser based on PbSe-SA at 1 µm band

Fig. 6. Performance of the pulse laser based on PbSe-SA at 1.5 µm band

Fig. 7. Spectrum and pulse train recorded on 1st，4th，5th，6th，8th，10th，20th harmonic waves

Fig. 8. Performance of PbSe-SA THDF co-doped fiber laser at 2 µm band