A model to predict the ablation width and calculate the ablation threshold of femtosecond laser

• Published in: Applied surface science 2018-10, Vol.456, p.482-486
• Main Authors: Liang, Jianchao, Liu, Weidong, Li, Yao, Luo, Zhen, Pang, Dongqing
• Format: Article
• Language: English
• Subjects: Ablation threshold; Ablation width; Femtosecond laser
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2018.06.093

Femtosecond laser with different scanning speeds processed SUS 301 stainless steel. A new model is built to predict the width of ablated channel and calculated the ablation threshold of the target. The calculated results which are calculated by the model approximates the experimental results. The error is so small that it can be ignored. The model can be used to predict the width of ablated channel and calculate the ablation threshold at other scanning speeds. [Display omitted] •A new model is built to predict the ablated channel of the target which is processed by femtosecond laser.•The model can be used to calculated the ablation threshold too.•The results approach to those which are calculated by the experimental results. The error is so small that it can be ignored. A new model is built to predict the width of ablated channel and calculated the ablation threshold of materials which are processed by femtosecond laser. In order to verify the accuracy of the model, a 50 MHz femtosecond laser with different scanning speeds is used to process the target. The micromorphology of the processed region consists of an ablated channel and a resolidification line. The widths of the ablated channel and the resolidification line are measured. The predicted results of the ablation channels are compared with the experimental results. The calculated ablation thresholds are compared with the results which are calculated by the previous method, too. Both errors are negligible. The model can be used to calculate the widths of the ablated channel and the resolidification line at other scanning speeds.