In this work, we fabricate the MoWS by microwave-assisted solvothermal method, and report the Q-switched Yb-doped fiber lasers (YDFL) using MoWS polymer film and tapered fiber as the saturable absorbers (SAs). The modulation depth and saturable intensity of the film SA are 5.63% and 6.82 MW cm. The shortest pulse duration and the maximum single pulse energy are 1.22 μs and 148.8 nJ for the film SA, 1.46 μs and 339 nJ for the fiber-taper SA. To the best of our knowledge, this is the first report on the Q-switched YDFL using MoWS SAs.
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