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Ultrafast thin-disk multi-pass amplifier system providing 1.9 kW of average output power and pulse energies in the 10 mJ range at 1 ps of pulse duration for glass-cleaving applications

Ultrafast thin-disk multi-pass amplifier system providing 1.9 kW of average output power and pulse energies in the 10 mJ range at 1 ps of pulse duration for glass-cleaving applications

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DIETZ, Thomas, Michael JENNE, Dominik BAUER, Michael SCHARUN, Dirk SUTTER, Alexander KILLI, 2020. Ultrafast thin-disk multi-pass amplifier system providing 1.9 kW of average output power and pulse energies in the 10 mJ range at 1 ps of pulse duration for glass-cleaving applications. In: Optics Express. Optical Society of America (OSA). 28(8), pp. 11415-11423. eISSN 1094-4087. Available under: doi: 10.1364/OE.383926

@article{Dietz2020-04-13Ultra-50766, title={Ultrafast thin-disk multi-pass amplifier system providing 1.9 kW of average output power and pulse energies in the 10 mJ range at 1 ps of pulse duration for glass-cleaving applications}, year={2020}, doi={10.1364/OE.383926}, number={8}, volume={28}, journal={Optics Express}, pages={11415--11423}, author={Dietz, Thomas and Jenne, Michael and Bauer, Dominik and Scharun, Michael and Sutter, Dirk and Killi, Alexander} }

Scharun, Michael Scharun, Michael Jenne, Michael Sutter, Dirk 2020-04-13 2020-09-10T08:52:58Z Dietz, Thomas Bauer, Dominik Killi, Alexander Sutter, Dirk Jenne, Michael 2020-09-10T08:52:58Z eng Ultrafast thin-disk multi-pass amplifier system providing 1.9 kW of average output power and pulse energies in the 10 mJ range at 1 ps of pulse duration for glass-cleaving applications Dietz, Thomas terms-of-use Bauer, Dominik An ultrafast Yb-doped thin-disk multi-pass laser amplifier system with flexible parameters for material processing is reported. We can generate bursts consisting of four pulses at a distance of 20 ns and a total energy of 46.7 mJ at a repetition rate of 25 kHz. In single-pulse operation, 1.5 kW of average output is achieved at 400 kHz when optimizing for a beam quality of M<sup>2</sup> = 1.5. Alignment for maximum output power provides 1.9 kW at the same repetition rate. All results are obtained without chirped-pulse amplification in the multi-pass set-up. The application potential of the system is demonstrated exploring its performance in materials processing of dielectrics. Cleaving of 3.8-mm-thick SCHOTT borofloat glass with a velocity of 1200 mm/s is demonstrated with 300 W of input power. Single-pass modification of 30 mm borosilicate glass is enabled with a Bessel beam at 1 kW of average power delivered by four-pulse bursts of an energy of 30 mJ. Killi, Alexander

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