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700 MW peak power of a 380 fs regenerative amplifier with Tm:YAP

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A. Wienke, D. Wandt, U. Morgner, J. Neumann, D. Kracht
700 MW peak power of a 380 fs regenerative amplifier with Tm:YAP
Optics Express 13 (23), 16884–16889 (2015)
Publication type: Journal Article (reviewed)
DOI: 10.1364/OE.23.016884

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.