Abstract: “We report on an optical setup to generate multi-Bessel beam profiles combining a refractive axicon and a spatial light modulator. Based on their particular beam profile, Bessel beams offer advantageous properties for micro drilling processes and internal volume processing, especially for transparent materials. In addition, the laser power of industrial, ultrashort pulsed lasers has increased significantly over the last few years, offering the possibility for highly efficient processes using multi-spot profiles. Our optical concept combines the dynamic possibilities of beam splitting using a spatial light modulator with the benefits of Bessel beams, which facilitates multi-Bessel beam processing. Beside the simulation and experimental evaluation of the generated multi-Bessel beams, we exemplify the applicability of the developed module for the perforation of thin metal foils by micro drilling.”
Open Access
Publication: Photonics
Issue/Year: Photonics, Volume 10; Number 4; Pages 413; 2023
Authors:Sanjeev Kumar, Shane M. Eaton, Monica Bollani, Belén Sotillo, Andrea Chiappini, Maurizio Ferrari, Roberta Ramponi, Paolo Di Trapani, Ottavia Jedrkiewicz
Laser surface structuring of diamond with ultrashort Bessel beams
Authors:Liang Yang and Shengyun Ji and Kenan Xie and Wenqiang Du and Bingjie Liu and Yanlei Hu and Jiawen Li and Gang Zhao and Dong Wu and Wenhao Huang and Suling Liu and Hongyuan Jiang and Jiaru Chu
High efficiency fabrication of complex microtube arrays by scanning focused femtosecond laser Bessel beam for trapping/releasing biological cells