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Q-switched pulse generation in Yb- and Er-doped fiber laser with WS2 saturable absorber

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We demonstrate Q-switched pulses with 13.6 and 179.6 nJ pulse energy in Yb- and Er-doped fiber lasers using a few-layer WS2-PVA saturable absorber. We attribute the saturable absorption to edge-induced sub-bandgap states in WS2.

© 2015 Optical Society of America

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