Abstract
Recent advances concerning the performance of mode-locked fiber lasers have been made, working at all-normal cavity dispersion whilst exploiting strong dissipation for pulse shaping. The current limitation of mode-locked step-index single-mode fiber lasers arises mainly from high nonlinearity accumulated in the small fiber core. By scaling the mode area exceptional performances in terms of pulse energy and peak power have been demonstrated using large-mode-area (LMA) photonic crystal fibers [1,2]. Most of these systems use a high modulation depth semi-conductor based saturable absorber mirror (SAM) for mode-locking, which limits average power scaling due to high non-saturable losses of the absorber and low thermal conductivity of the substrate, leading to strong thermal load and degradation of the SAM.
© 2011 Optical Society of America
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