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An erbium-doped polycrystalline yttrium aluminum garnet ( , and Er:YAG) ceramic laser is passively Q-switched by a few-layer graphene at 1617 nm. When in-band is pumped by a continuous-wave Er,Yb fiber laser at 1532 nm, the laser produces a continuous and stable train of Q-switched pulses with pulse energy of as much as 12.2 , pulse repetition...
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