Abstract

Compared with ${{\rm SnS}_2}$ and ${{\rm SnSe}_2}$, SnSSe shows high hole mobilities and short relaxation time, resulting in potential applications in photoelectric devices. Here SnSSe is investigated for the ultrashort pulse generation in the mode-locked fiber laser. The prepared SnSSe saturable absorber (SA) exhibits a large modulation depth of 56.75%. Because of the saturable absorption characteristic of the SnSSe SA, mode-locked pulses as short as 158.6 fs with a signal-to-noise ratio of 94 dB are obtained at 1560.9 nm. The nonlinear exploration of SnSSe offers the possibility to explore further applications of SnSSe in near-infrared regions, especially for ultrafast photonic devices and modulators.

© 2020 Optical Society of America

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