We report on an ultrashort pulse fiber CPA system that delivers pulses with 2.2 mJ pulse energy. The main amplifier of the system is a 108 µm core diameter Large Pitch Fiber. By SLM-based compensation of the nonlinear phase we achieved sub-500 fs pulses with clean shapes and a resulting peak power as high as 3.8 GW.

© 2011 Optical Society of America

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