Lopez John, Niane Samba, Bonamis Guillaume, Balage Pierre, Audouard Eric, Hönninger Clemens, Mottay Eric, Manek-Hönninger Inka
Opt Express. 2022 Apr 11;30(8):12533-12544. doi: 10.1364/OE.455553.
We report for the first time to our knowledge on top-down percussion drilling of high-quality deep holes in different glasses with femtosecond laser pulses in GHz-burst mode. We reveal the dynamics of the percussion drilling process by pump-probe shadowgraphy and thermal camera imaging demonstrating that the drilling process in GHz-burst mode is fundamentally different from single-pulse processing and confirming the presence of thermal accumulation. Moreover, we show a comparison to drilling by femtosecond single-pulses containing an equal laser fluence in sodalime, alkali-free alumina-borosilicate, fused silica, and sapphire.
据我们所知，我们首次报道了在GHz脉冲模式下用飞秒激光脉冲对不同玻璃进行自上而下的冲击钻孔以形成高质量深孔。我们通过泵浦-探测阴影成像和热像仪成像揭示了冲击钻孔过程的动力学，表明GHz脉冲模式下的钻孔过程与单脉冲加工有根本不同，并证实了热积累的存在。此外，我们还展示了在钠钙玻璃、无碱铝硼硅酸盐玻璃、熔融石英和蓝宝石中，与具有相同激光能量密度的飞秒单脉冲钻孔的对比。
