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Shock-wave propagation and cavitation bubble oscillation by Nd:YAG laser ablation of a metal in water

机译:Nd:YAG激光烧蚀水中金属的冲击波传播和空化气泡振荡

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摘要

A highly sensitive fiber-optic sensor based on optical beam deflection is applied for investigating the propagation of a laser-induced plasma shock wave, the oscillation of a cavitation bubble diameter, and the development of a bubble-collapse-induced shock wave when a Nd:YAG laser pulse is focused upon an aluminum surface in water. By the sequence of experimental waveforms detected at different distances, the attenuation properties of the plasma shock wave and of the bubble-collapse-induced shock wave are obtained. Besides, based on characteristic signals, both the maximum and the minimum bubble radii at each oscillation cycle are determined, as are the corresponding oscillating periods.
机译:基于光束偏转的高灵敏度光纤传感器用于研究激光诱导的等离子体冲击波的传播,空化气泡直径的振荡以及当Nd时气泡塌陷引起的冲击波的发展。 :YAG激光脉冲聚焦在水中的铝表面上。通过在不同距离处检测到的实验波形序列,可以获得等离子体冲击波和气泡塌陷引起的冲击波的衰减特性。此外,基于特征信号,确定每个振荡周期的最大和最小气泡半径,以及相应的振荡周期。

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