研究目的
Investigating the ablation efficiency of copper using bursts of ultrashort pulses with varying pulse durations and numbers of pulses per burst.
研究成果
The burst mode with 3 pulses per burst significantly improves ablation efficiency and surface quality compared to single-pulse regimes. The highest laser milling ablation efficiency for copper was achieved with this configuration.
研究不足
The study is limited to copper material and specific laser parameters. The findings may not be directly applicable to other materials or laser systems.
1：Experimental Design and Method Selection:
A solid-state laser with variable pulse duration and burst capability was used to ablate copper samples. The study focused on optimizing the beam size for various pulse durations and numbers of pulses per burst.
2：Sample Selection and Data Sources:
Copper samples with high purity and low surface roughness were used. The ablation efficiency was measured by engraving rectangular cavities and analyzing their profiles.
3：List of Experimental Equipment and Materials:
A solid-state laser (Carbide, Light Conversion), galvanometer scanner (Intelliscan 14, Scanlab), F-theta lens, SEM (JSM-6490LV, JEOL), and stylus profiler (Dektak 150, Veeco) were used.
4：Experimental Procedures and Operational Workflow:
The laser beam was focused and defocused to vary the spot size on the copper surface. Cavities were engraved with varying parameters, and their profiles were measured to determine ablation efficiency and surface roughness.
5：Data Analysis Methods:
The ablation efficiency was calculated based on the volume of material removed per unit of energy. Surface roughness was measured using a stylus profiler.
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