We report on a laser system producing a burst comprising femtosecond pulses with a total energy of 58 mJ. Every single pulse within this burst has an energy between 27 and 31 μJ. The pump is able to rebuild the inversion fast enough between the pulses, resulting in an almost constant gain for every pulse during the burst. This causes a very homogenous energy distribution during the burst. The output burst has a repetition frequency of 20 Hz, is 200 μs long and, therefore, contains 2000 pulses at a pulse repetition rate of 10 MHz.
© 2012 Optical Society of America
Lasers and Laser Optics
Original Manuscript: August 27, 2012
Revised Manuscript: October 29, 2012
Manuscript Accepted: November 19, 2012
Published: December 12, 2012
Sven Breitkopf, Arno Klenke, Thomas Gottschall, Hans-Jürgen Otto, Cesar Jauregui, Jens Limpert, and Andreas Tünnermann, "58 mJ burst comprising ultrashort pulses with homogenous energy level from an Yb-doped fiber amplifier," Opt. Lett. 37, 5169-5171 (2012)