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Millijoule femtosecond micro-Bessel beams for ultra-high aspect ratio machining

机译:毫焦耳飞秒微贝塞尔光束用于超高纵横比加工

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We report on a functional experimental design for Bessel beam generation capable of handling high-energy ultra-short pulses (up to 1.2 mJ per pulse of 50 fs duration). This allows us to deliver intensities exceeding the breakdown threshold for air or any dielectric along controlled micro-filaments with lengths exceeding 4 mm. It represents an unprecedented upscaling in comparison to recent femtosecond Bessel beam micromachining experiments. We produce void microchannels through glass substrates to demonstrate that aspect ratios exceeding 1200: 1 can be achieved by using single high-intensity pulses. This demonstration must lead to new methodologies for deep-drilling and high-speed cutting applications. (C) 2015 Optical Society of America
机译:我们报告了一种能够处理高能超短脉冲(每50 fs持续时间高达1.2 mJ脉冲)的贝塞尔光束生成的功能实验设计。这使我们能够沿着长度超过4毫米的受控微丝传递超过空气或任何电介质击穿阈值的强度。与最近的飞秒贝塞尔光束微加工实验相比,它代表了前所未有的升级。我们通过玻璃基板产生空隙微通道,以证明使用单个高强度脉冲可以实现超过1200:1的纵横比。该演示必须为深钻孔和高速切割应用带来新的方法论。 (C)2015年美国眼镜学会

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