Thick Glass High-Quality Cutting by Ultrafast Laser Bessel Beam Perforation-Assisted Separation

The cutting of thick glass is extensively employed in aerospace, optical, and other fields. Although ultrafast laser Bessel beams are heavily used for glass cutting, the cutting thickness and cutting quality need to be further improved. In this research, the high-quality cutting of thick glass was r...

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Bibliographic Details
Published in:Micromachines (Basel) 2024-06, Vol.15 (7), p.854
Main Authors: Chen, Suwan, Luo, Yuxuan, Fan, Xinhu, Wu, Congyi, Zhang, Guojun, Huang, Yu, Rong, Youmin, Chen, Long
Format: Article
Language:English
Subjects:
Ablation
Bessel beam
Carbon dioxide
Carbon dioxide lasers
Crack propagation
Cutting parameters
Defocusing
glass cutting
Heat
Infrared lasers
Laser beams
Laser etching
laser perforation
Methods
Perforation
Separation
Soda-lime glass
Surface roughness
thick glass
ultrafast laser
Ultrafast lasers
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Summary:The cutting of thick glass is extensively employed in aerospace, optical, and other fields. Although ultrafast laser Bessel beams are heavily used for glass cutting, the cutting thickness and cutting quality need to be further improved. In this research, the high-quality cutting of thick glass was realized for the first time using ultrafast laser perforation assisted by CO laser separation. Initially, an infrared picosecond laser Bessel beam was employed to ablate the soda-lime glass and generate a perforated structure. Subsequently, a CO laser was employed to induce crack propagation along the path of the perforated structure, resulting in the separation of the glass. This study investigates the influence of hole spacing, pulse energy, and the defocusing distance of the picosecond laser Bessel beam on the average surface roughness of the glass sample cutting surface. The optimal combination of cutting parameters for 6 mm thick glass results in a minimum surface roughness of 343 nm in the cross-section.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi15070854