Abstract

A high pulse energy passively mode-locked fiber laser operating in the all-normal dispersion regime is demonstrated. The gain material is an Yb-doped multicore photonic crystal fiber with 18 cores in array-type geometry. Robust and self-starting mode locking is achieved using a fast semiconductor saturable absorber mirror. The laser generates 180nJ chirped pulses at a 14.48MHz repetition rate for an average power of 2.6W. The 1.15ps output pulses are compressed to 690fs outside the cavity.

© 2011 Optical Society of America

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