Abstract

We report the generation of high-energy high-peak power pulses in an all-normal dispersion fiber laser featuring large-mode-area photonic crystal fibers. The self-starting chirped-pulse fiber oscillator delivers 11W of average power at 15.5MHz repetition rate, resulting in 710nJ of pulse energy. The output pulses are dechirped outside the cavity from 7ps to nearly transform-limited duration of 300fs, leading to pulse peak powers as high as 1.9MW. Numerical simulations reveal that pulse shaping is dominated by the amplitude modulation and spectral filtering provided by a resonant semiconductor saturable absorber.

© 2010 Optical Society of America

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