Abstract
High pulse-energy up to 163nJ is generated in a graphene mode-locked Yb-doped double-clad fiber laser with repetition-rate of 1.04-MHz. Graphene passive-Q-switched operation of ~2.2μs pulse-width is also demonstrated with tunable repetition-rate from 6-kHz to 150-kHz.
© 2011 Optical Society of America
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