LAMpAS achieves target ultrafast laser parameters

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The thin-disk multipass amplifier module developed by Trumpf. (Image: LAMpAS)

The EU-funded project LAMpAS has announced that the target parameters of its kilowatt-class ultrafast laser have been reached.

The pulsed laser, developed by Trumpf, exceeds 1.5kW of average optical power and operates at gigawatt-class peak power, with fundamental mode beam quality at a near-infrared wavelength of one micrometre. 

LAMpAS was established in 2019 with a grant of €5.1 million under the EU’s Horizon 2020 programme. The project is developing laser structuring technology capable of producing nature-inspired functionalised surfaces on an industrial scale, for applications including anti-fingerprint, decorative and easy-to-clean finishes for ovens, fridges and other home appliances.

The Trumpf laser will now be integrated into a system designed for micro-machining larger square-metre sized surfaces. The laser will be combined with advanced optical concepts in order to achieve the required high-throughput materials processing.

PhD Student Johanna Dominik recently presented the laser at the Advanced Solid State Lasers Conference 20211. Her system builds on Trumpf’s commercially available TruMicro series 6000 based on InnoSlab technology as a front end2, here operating at an average power of 300W, followed by a thin-disk laser booster stage providing more than five fold amplification3

This compact and efficient thin-disk multipass amplifier module is a technological break-through in robustness, according to the project partners. The large area of the disk conveniently enables the generating of an extreme peak power with no need for temporal post-compression of the pulses, which are adjustable in duration between 3ps and 10ps via the front-end. 

The laser was specially developed for the unique demands of the LAMpAS project, including a narrow spectral bandwidth below 1nm that is ideal for direct laser interference patterning. The linear amplifier chain particularly enables high flexibility including burst functionality as well as the full 1.5kW average power over a wide range of repetition rates between 375kHz to 5MHz, compatible with fast scanners.

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References

[1] J. Dominik et al., 'Multi-Kilowatt Ultrafast Laser with Thin-Disk Technology', in Laser Congress 2021 (ASSL, LAC), OSA Technical Digest (Optical Society of America, 2021), paper AM2A.6.

[2] Trumpf homepage: https://www.trumpf.com/en_INT/products/laser/short-and-ultrashort-pulse-laser/trumicro-series-6000 (2021)

[3] J. Dominik et al., 'Thin-disk multipass amplifier for kilowatt-class ultrafast lasers above 100 mJ,' 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021, doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542612.

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