Advanced welding of transparent materials by ultrashort laser pulses

Zimmermann, Felix; Jenne, Michael; Großmann, Daniel; Gruber, Andreas; Kumkar, Malte

doi:10.1117/12.2291451

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…a close to diffraction limited, at 1.8 mJ pulse energy and 1.1 kW of average output power, only limited by the employed pump power. In contrast to previous results, an all-glass monolithic mirror array has been deployed, based on femtosecond glass welding with a TruMicro 2020 [27] providing superior thermal and mechanical stability aiming at industrial robustness. Productivity scaling with such systems is expected to make ultrafast laser processing attractive for new fields of industrial applications [4] [5] [10].…”

mentioning

confidence: 99%

High Power and High Energy Ultrafast Disk Lasers for Industrial Applications

Sutter¹,

Dietz²,

Bauer³

et al. 2019

Conference on Lasers and Electro-Optics

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mentioning

confidence: 99%

High Power and High Energy Ultrafast Disk Lasers for Industrial Applications

Sutter¹,

Dietz²,

Bauer³

et al. 2019

Conference on Lasers and Electro-Optics

Self Cite

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Reproducible process regimes during glass welding by bursts of subpicosecond laser pulses

2020

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During welding of glass with ultrafast lasers, an irregular formation of weld seams was prevented by modulation of the average laser power and spatial beam shaping. The formation of individual molten volumes in regular intervals was achieved by means of power modulation, resulting in a predictable and reproducible weld seam with a regular structure. At constant average power, a homogeneous weld seam without a periodic signature was alternatively achieved by means of a shaped beam generating an elongated interaction volume and resulting in a continuous melting of the material. The influence of the two approaches, and their combination on the process dynamics, was analyzed by means of high-speed videos of the plasma emission and of the formation of the seams.

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Process monitoring based on plasma emission for power-modulated glass welding with bursts of subpicosecond laser pulses

2021

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Defects and process irregularities influence the bonding strength and thus the stability and lifetime of welded glass components. The present paper proposes to monitor the laser-based glass welding process by means of a single photodetector that records the radiation emitted from the laser-induced plasma. It is shown that the plasma emission provides information about irregularities of the welded seam height, gap bridging, process interruptions, and the position of the seam. The method is suitable for different welded glass types.

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Advanced welding of transparent materials by ultrashort laser pulses

Cited by 3 publications

References 15 publications

High Power and High Energy Ultrafast Disk Lasers for Industrial Applications

High Power and High Energy Ultrafast Disk Lasers for Industrial Applications

Reproducible process regimes during glass welding by bursts of subpicosecond laser pulses

Process monitoring based on plasma emission for power-modulated glass welding with bursts of subpicosecond laser pulses

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