Study on the influence of repetition rate and pulse duration on ablation efficiency using a new generation of high power ytterbium doped fiber ultrafast laser

John Lopez; Rémi Torres; Yoann Zaouter; Patrick Georges; Marc Hanna; Eric Mottay; Rainer Kling

doi:10.1117/12.2002080

15 March 2013 Study on the influence of repetition rate and pulse duration on ablation efficiency using a new generation of high power ytterbium doped fiber ultrafast laser

John Lopez, Rémi Torres, Yoann Zaouter, Patrick Georges, Marc Hanna, Eric Mottay, Rainer Kling

Author Affiliations +

Proceedings Volume 8611, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIII; 861118 (2013) https://doi.org/10.1117/12.2002080
Event: SPIE LASE, 2013, San Francisco, California, United States

Abstract

Ultrafast laser are well known to provide cold ablation on metals at near-threshold fluence and low repetition rate. However increasing the repetition rate from multi-kHz to MHz may produce a heat accumulation in the target depending on both the scanning speed and the material properties. This potentially leads to two effects: enhanced ablation efficiency as well as increased heat affected zone. To identify potentials and limitations while maintaining highest processing quality is the main objective of this paper and a key issue for many industrial applications. We present some comprehensive results on the influence of both repetition rate and pulse duration on the ablation efficiency. This investigation is performed using a new generation of high power Ytterbium doped fiber ultrafast laser with a tunable pulse duration ranging from 350fs to 10ps and with repetition rate going from 250kHz to 2MHz. The output power is up to 40 watt. The effect of both parameters above on ablation efficiency of Al, Cu and Mo is discussed with respect to removal rate measurement and SEM analysis.

Citation Download Citation

John Lopez, Rémi Torres, Yoann Zaouter, Patrick Georges, Marc Hanna, Eric Mottay, and Rainer Kling "Study on the influence of repetition rate and pulse duration on ablation efficiency using a new generation of high power ytterbium doped fiber ultrafast laser", Proc. SPIE 8611, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIII, 861118 (15 March 2013); https://doi.org/10.1117/12.2002080

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