Laser surface structuring with 100 W of average power and sub-ps pulses
| Autor: | Kurt J. Weingarten, Markus Zimmermannn, Bojan Resan, Ronny De Loor, B. Jaeggi, Lars Penning, Vesna Markovic, Beat Neuenschwander |
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| Rok vydání: | 2016 |
| Předmět: |
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Materials science 010308 nuclear & particles physics business.industry Laser beam machining Biomedical Engineering 02 engineering and technology Radius Edge (geometry) 021001 nanoscience & nanotechnology Laser 01 natural sciences Fluence Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Quality (physics) Optics Machining law 0103 physical sciences 0210 nano-technology business Instrumentation |
| Zdroj: | Journal of Laser Applications. 28:022506 |
| ISSN: | 1938-1387 1042-346X |
| DOI: | 10.2351/1.4944104 |
| Popis: | High throughput still represents a key factor for industrial use of ultrashort pulses in the field of surface structuring. Reliable systems with average powers up to 100 W are today available. It has already been proved that metals, especially steel having a low threshold fluence, can be machined with excellent surface quality at average powers of more than 40 W and a spot radius of about 25 μm, if a polygon line scanner, offering fast scanning speeds, is used. A further scale-up into the 100 W regime should be possible for metals showing a threshold fluence of about 0.2 J/cm2 or higher. But, it will lead to problems with heat accumulation in the case of steel and a straight forward scale-up is not possible. In order to keep a good surface quality, the machining strategy has to be adapted. A maximum flexibility can be obtained with an “interlaced” mode by using very high marking speeds of several 100 m/s and repetition rates of several tenths of MHz. As this is at the edge of today available technologies,... |
| Databáze: | OpenAIRE |
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