期刊
OPTICS EXPRESS
卷 28, 期 8, 页码 11415-11423出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.383926
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资金
- Bundesministerium fur Bildung und Forschung [13N13927, 13N13930]
- Horizon 2020 Framework Programme [825132]
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-2 = 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. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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