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 μJ 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.
© 2013 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: November 5, 2012
Revised Manuscript: December 10, 2012
Manuscript Accepted: December 10, 2012
Published: January 7, 2013
Yoann Zaouter, Florent Guichard, Louis Daniault, Marc Hanna, Franck Morin, Clemens Hönninger, Eric Mottay, Frédéric Druon, and Patrick Georges, "Femtosecond fiber chirped- and divided-pulse amplification system," Opt. Lett. 38, 106-108 (2013)