title: 700 MW peak power of a 380 fs regenerative amplifier with Tm:YAP.
abstract: We report on a high power ultrashort pulse regenerative amplifier system, entirely based on thulium-doped laser materials operating around 1.94 μm. At a repetition rate of 1 kHz the Tm:YAP regenerative amplifier emits pulse energies > 700 μJ, only limited by the damage threshold of the Tm:YAP crystal. The pulses can be compressed to 380 fs at an efficiency of 50 %. Purging of the regenerative amplifier cavity with nitrogen is necessary due to atmospheric absorptions causing long ps pedestals in the autocorrelation.
authors.forename: Andreas
authors.initials: A
authors.lastname: Wienke
authors.forename: Dieter
authors.initials: D
authors.lastname: Wandt
authors.forename: Uwe
authors.initials: U
authors.lastname: Morgner
authors.forename: Jörg
authors.initials: J
authors.lastname: Neumann
authors.forename: Dietmar
authors.initials: D
authors.lastname: Kracht