High precision and high throughput surface structuring by synchronizing mechanical axes with an ultra short pulsed laser system in MOPA arrangement

Jaeggi, B.; Neuenschwander, Beat; Hunziker, Urs; Zuercher, Joseph; Meier, Thomas; Zimmermann, Martin; Hennig, Guido

doi:10.2351/1.5062381

Cited by 5 publications

(9 citation statements)

References 10 publications

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“…Dold [176] has provided a detailed study of the influence of the different scanning strategies on the ablation rate, roughness and processing time of the laser surface machining (Figure 7). diameter 5.7 µm, 120 mW, 300 kHz, 1 µm pitch, 60 layers) [10,11].…”

Section: Classic Methods Of Laser Beam Scanningmentioning

confidence: 99%

“…Overcoming plasma shielding effects can be achieved via the application of a long enough time delay between laser pulses (MHz or lower frequencies), and then the plasma plume optical density becomes low enough before every next laser pulse. Such laser pulse frequencies are applicable for optical systems with laser beam scanning speeds up to 10–20 m/s, which are needed for optimal laser spots overlapping 30–50% [ 10 , 13 ].…”

Section: Physical Limitations Of Laser Surface Texturingmentioning

confidence: 99%

“… Precision and quality of bar texturing (from top to bottom: laser spots disposition, 3D and section profilometry): ( a ) without sky-writing; ( b ) with sky-writing; ( c ) synchronized system (10 ps, diameter 5.7 µm, 120 mW, 300 kHz, 1 µm pitch, 60 layers) [ 10 , 11 ]. …”

Section: Figurementioning

confidence: 99%

“…Involving the fastest scanning techniques, for example, the application of polygon scanners, acousto-optic beam deflection or sample rotation, has several limitations, such as dead processing time, low deflection angle, sample geometry specification and others. At higher laser surface scanning speeds, it becomes more and more difficult to maintain the high precision of LST, due to the synchronization loop between the laser and the scanning system [ 9 , 10 , 11 ]. The application of high-frequency lasers with ultrashort laser pulses meets the physical limitations of LST, such as heat accumulation between laser pulses and ablated plasma shielding effects [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Scanning Strategies in Laser Surface Texturing: A Review

2023

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Laser surface texturing (LST) is one of the most promising technologies for controllable surface structuring and the acquisition of specific physical surface properties needed in functional surfaces. The quality and processing rate of the laser surface texturing strongly depend on the correct choice of a scanning strategy. In this paper, a comparative review of the classical and recently developed scanning strategies of laser surface texturing is presented. The main attention is paid to maximal processing rate, precision and existing physical limitations. Possible ways of further development of the laser scanning strategies are proposed.

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Section: Classic Methods Of Laser Beam Scanningmentioning

confidence: 99%

Section: Physical Limitations Of Laser Surface Texturingmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Scanning Strategies in Laser Surface Texturing: A Review

2023

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“…The scan parameters have to be adapted to the new situation of a synchronized marking. The strategy was developed in previous works by using a synchronized galvo scanner [18][19][20][21] . A scanning strategy found to give high-quality results using a marking speed resulting in a pulse overlap of 75 %, equal to a pitch of a fourth of the beam radius w 0 .…”

Section: Introductionmentioning

confidence: 99%

High-throughput and high-precision laser micromachining with ps-pulses in synchronized mode with a fast polygon line scanner

et al. 2014

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To be competitive in laser micro machining, high throughput is an important aspect. One possibility to increase productivity is scaling up the ablation process i.e. linearly increasing the laser repetition rate together with the average power and the scan speed. In the MHz-regime high scan speeds are required which cannot be provided by commercially available galvo scanners. In this work we will report on the results by using a polygon line scanner having a maximum scan speed of 100 m/s and a 50 W ps-laser system, synchronized via the SuperSync TM technology. We will show the results concerning the removal rate and the surface quality for working at the optimum point i.e. most efficient point at repetition rates up to 8.2 MHz.

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