Precision control of hole morphology by modulating femtosecond laser beam track with a four-wedge drilling system

IF 5 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-09-22 DOI:10.1016/j.optlastec.2025.113972

Ziyao Qin , Jian Yang , Jian Niu , Long Chen , Kaiqiang Cao , Tianqing Jia , Hongxing Xu

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引用次数: 0

Abstract

Laser drilling has been widely applied across various industries, with increasingly stringent requirements for hole quality as precision devices continue to evolve. This study aims to develop a femtosecond laser drilling method based on a four-wedge system, enabling precise control over the spatial characteristics of the focused beam and resulting hole geometry. By adjusting the translation distances and rotation angles of the optical wedges, the inclination angle and rotation diameter of the beam can be flexibly tuned. Various tapered holes including positive, zero, and negative taper were successfully fabricated on 2 mm-thick cobalt-based superalloy. The correlation between wedge parameters and hole morphology was established, and the evolution process of each hole type was characterized. Additionally, the discrepancies between the theoretical beam path and the actual hole shape were analyzed, which may be attributed to nonlinear optical effects such as self-focusing and multiple reflections. This work provides a theoretical and experimental foundation for tailoring hole geometries in femtosecond laser micromachining.

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利用四楔钻削系统调制飞秒激光束轨迹实现孔形态的精确控制

激光打孔已广泛应用于各个行业，随着精密设备的不断发展，对钻孔质量的要求也越来越严格。本研究旨在开发一种基于四楔系统的飞秒激光钻孔方法，能够精确控制聚焦光束的空间特性和产生的孔几何形状。通过调节光楔的平移距离和旋转角度，可以灵活调节光束的倾角和旋转直径。在厚度为2mm的钴基高温合金上成功制备了正、零、负锥孔。建立了楔形参数与孔洞形态的相关性，表征了各孔洞类型的演化过程。此外，分析了理论光束路径与实际孔形之间的差异，这可能是由于自聚焦和多次反射等非线性光学效应造成的。该工作为飞秒激光微加工中孔几何形状的裁剪提供了理论和实验基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems