Journal
OPTICS LETTERS
Volume 38, Issue 2, Pages 106-108Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.38.000106
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We implement both chirped pulse amplification and divided pulse amplification in the same femtosecond fiber amplifier setup. This scheme allows an equivalent stretched pulse duration of 2.4 ns in a compact tabletop system. The generation of 77 W of compressed average power at 4.8 MHz, together with 320 fs and 430 mu J pulses at a repetition rate of 96 kHz, is demonstrated using a distributed mode-filtering, rod-type, ytterbium-doped fiber. Limitations in the temporal recombining efficiency due to gain saturation inside the fiber amplifier are identified. (C) 2013 Optical Society of America
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