High efficiency GHz laser processing with long bursts
New article written by Eric Mottay, co-founder and CEO of Amplitude, and Eric Audouard, Industrial Applications expert at Amplitude, published Published 30 January 2023 by IOP Publishing Ltd on behalf of the IMMT International Journal of Extreme Manufacturing
Bursts of GHz repetition rate pulses involve more ablation mechanisms than single femtosecond pulses. Efficient ablation by GHz laser pulses is a multi-step process, consisting of a first thermal incubation phase, followed by a highly efficient ablation phase. GHz ablation therefore combines thermal and non-thermal ablation mechanisms. With an optimal choice of the burst duration, the ablation efficiency can be highly enhanced. Long bursts, comprising tens of pulses to hundreds of pulses, are needed to take full advantage of the increase in ablation efficiency.
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✨ A NEW ERA IN THE ULTRAFAST PROCESSES
> GHz femtosecond laser processing offers the potential to significantly increase the ablation efficiency of ultrafast laser material processing.
> GHz laser processing consists of a multi-step ablation process: A first thermal incubation phase, followed by highly efficient thermal and non-thermal ablation.
> Long bursts of tens of pulses to hundreds of pulses are key to achieving high ablation efficiency.
// SEE HOW IT WORKS https://youtu.be/HmsNOa0z4RQ
👉 AMAZING RESULTS IN INDUSTRIAL APPLICATIONS
✔ Percussion glass drilling with Tangor 100W IP GHz option >> No damage on material, 30 μm drilling diameter, up to 500 μm depth (High aspect ratio 1:16)
✔ Ribblet texturing on stainless steel with Tangor 100W SHG & GHz options >> High ablation efficiency, control on the bottom flatness, ribblets’ height 40 μm
✔ Efficient silicon dicing with Tangor 100W SHG & GHz options >> Absence of cracks (HAZ), low energy needed, beam splitting suitable, low overlap
✔ Black marking on stainless steel with Tangor IP GHz option >> high efficiency, high contrast, low energy needed, beam splitting suitable, single pass