We report on the 5 W average power, supercontinuum generation in different air-silica microstructered fibers using a compact large-mode-area ytterbium-doped femtosecond fiber amplifier at 1060 nm center wavelength as the excitation source. The flat continuum ranges from <500 nm to >1800 nm. The experimental results are confirmed by numerical simulations, revealing the evolution and fission of higher order solitons as the main contribution to the continuum.

© 2003 Optical Society of America

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