An effective focusing setting in femtosecond laser multiple pulse ablation

Chang, Gang; Tu, Yiliu

doi:10.1016/j.optlastec.2013.04.025

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…The ablation rate peaks, however, apparently shifted in the opposite direction towards the material edge, contradicting this assumption. It does, however, coincide with the findings of Chang et al [33], who stated that a defocused laser machining process with ultrashort pulses on the material's surface leads to a higher material removal rate. The study explains that the highest material removal rate is found at z 2 top + z 2 r / z 2 + z 2 r = e 2 , with z as the focal plane shift, z top as the distance between the peak point of the laser-affected volume and the focal plane and z r as the Rayleigh length.…”

Section: Laser Turning With a Steady Beamsupporting

confidence: 88%

Fundamental Considerations and Analysis of the Energy Distribution in Laser Turning with Ultrashort Laser Pulses

Zettl,

Esen,

Hellmann

2023

Micromachines

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This article discusses the process of the laser turning of rotational symmetric, cylindrical components using ultrashort laser pulses with respect to the geometrical conditions and the resulting energy distribution during the laser turning process. As a result, process predictions and potential process optimizations are feasible. Particular attention is drawn to the laser spot formation on the cylindrical surface of the work piece in conjunction with the positioning of the laser beam relative to the rotation axis of the specimen. Based on fundamental calculations and experimental results, an optimum processing strategy is discussed, whereat the use of a trepanning optic in the laser turning process and the forming of a particular surface structure is additionally being issued.

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Section: Laser Turning With a Steady Beamsupporting

confidence: 88%