@inproceedings{c3200cf452894cbfad8ccb4d5e010531,
title = "Characterizing focusing properties during ultrafast laser ablation based on acoustic emission technology",
abstract = "Ultrafast laser manufacturing is essential for precision engineering. However, real-time focusing on curved surfaces remains challenging. Existing image-based methods are slow and reflectivity-sensitive, while optical solutions require complex modifications. Here, this study introduces a focusing method using the acoustic emission (AE) signal from laser ablation. Through synchronized motion experiments, we observed a dual-peak profile in the acoustic RMS during defocus-focus-defocus transitions, with a distinctive dip occurring at the focal point. This acoustic signature presents a clear contrast to the Gaussian profile exhibited by optical point spread functions. This feature provides micrometer-scale axial resolution. The mechanism was validated through ablation morphology, plasma plume analysis, and numerical simulations. Requiring no additional optics, this method integrates seamlessly into existing systems and holds promise for high-precision, low-cost, real-time feedback control in applications such as cardiovascular stent fabrication.",
keywords = "acoustic emission, focusing properties, plasma plumes, Ultrafast laser ablation",
author = "Yanzhe Fu and Yao Su and Jiayong Wei and Jianhua Zhu and Fei Li and Liangcheng Duan and Xiang Ding and Jiebo Li",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; 3rd International Conference on UltrafastX 2025 ; Conference date: 23-10-2025 Through 26-10-2025",
year = "2026",
month = mar,
day = "3",
doi = "10.1117/12.3097627",
language = "英语",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Yuxi Fu and Wenhui Fan",
booktitle = "Third International Conference on UltrafastX 2025",
address = "美国",
}