论文标题
使用自动混合干涉测量法诱导的多脉冲激光消融诱导的血浆积累的时间分辨定量
Time-resolved quantification of plasma accumulation induced by multi-pulse laser ablation using self-mixing interferometry
论文作者
论文摘要
在这项工作中，提出了一种基于自我混合干涉法（SMI）的方法，用于探测由多脉冲激光消融诱导的等离子体羽流的浓度。开发了一个分析模型，以解释单臂干涉信号，以等离子体电子密度。它的时间依赖性遵循幂律缩放，该扩展是由羽流积累和传播的同时影响确定的。该模型已应用于不同材料上可变激光脉冲频率下羽状形成的实验研究。已经通过高速成像观察到了羽流的动力学，并且允许对电子密度的时间分辨估计进行SMI测量。 SMI技术在鲁棒性和低侵入性方面的固有优势将允许其用作快速诊断工具，用于激光诱导的羽毛的动态缩放。此外，它可以轻松地应用于基于激光的制造技术中，在血浆浓度监测和控制很重要的情况下。
In this work a method based on self-mixing interferometry (SMI) is presented for probing the concentration of plasma plumes induced by multi-pulse laser ablation. An analytical model is developed to interpret the single-arm interferometric signal in terms of plasma electron number density. Its time dependence follows a power-law scaling which is determined by concurrent effects of plume accumulation and propagation. The model has been applied for the experimental study of plume formation at variable laser pulse frequencies on different materials. The plume expansion dynamics has been observed with high-speed imaging, and the SMI measurements allowed for a time-resolved estimation of the electron number density. The intrinsic advantages of the SMI technique in terms of robustness and low intrusiveness would allow for its usage as a fast diagnostic tool for the dynamical scaling of laser-induced plumes. Moreover it can be easily applied in laser-based manufacturing technologies where plasma concentration monitoring and control is important.
