Tunable soliton molecules in mode-locked fiber laser based on GeBi4Te7 saturable absorber

As a member of 2D materials, GeBi4Te7 (GBT) nanoflakes about 3 nm thickness were fabricated using liquid-phase exfoliation. The GBT-SA has excellent nonlinear optical effects that the modulated depth and saturation power are 6.6 % and 1.07 mW measured by the double-balance detection method. The single-, dual-, triple-, fifth-, sixth-, and tenth-pulses molecules have been recorded under different pump power in the cavity length of 26.5 m, 16.7 m and 13.5 m cavities. These multiple soliton molecules are state-tunable by only adjusting pump power. The experimental results demonstrate the GBT has excellent nonlinear optics effects and broad application prospects in fiber communication and ultrafast lasers.

Automated summary

GBT nanoflakes with a thickness of about 3 nm were fabricated using liquid-phase exfoliation. The GBT-SA exhibited excellent nonlinear optical effects and showed great potential in applications such as fiber communication and ultrafast lasers.