High-power blue laser and copper welding with near-infrared fiber laser

Taisuke Atsumi; Kohei Kawasaki; Sumika Sano; Hiroatsu Aoki; Hajime Mori; Nobuyasu Matsumoto; Hiroto Kageyama; Ryoya Matsumoto; Toshiaki Sakai; Yasumasa Kawakita; Naoki Tsukiji

doi:10.1117/12.3002248

12 March 2024 High-power blue laser and copper welding with near-infrared fiber laser

Taisuke Atsumi, Kohei Kawasaki, Sumika Sano, Hiroatsu Aoki, Hajime Mori, Nobuyasu Matsumoto, Hiroto Kageyama, Ryoya Matsumoto, Toshiaki Sakai, Yasumasa Kawakita, Naoki Tsukiji

Author Affiliations +

Proceedings Volume 12867, High-Power Diode Laser Technology XXII; 128670A (2024) https://doi.org/10.1117/12.3002248
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

Copper is widely used in many industries due to high electrical conductivity and with the recent acceleration of EV shift, the needs for copper material processing are rapidly increasing. High power near-infrared (NIR) fiber lasers have been used in laser processing since high electric-optic conversion efficiency and excellent laser beam quality. However, copper welding with NIR fiber lasers is challenging. The absorption of copper is low in the NIR, and copper with high thermal conductivity diffuses the heat rapidly at welding spots. Previously we reported the hybrid laser system with 1- kW blue laser and 3-kW NIR fiber laser for copper welding. Blue laser with high absorption of copper generates stable molten pool at welding spots and assists NIR fiber laser processing for uniform welding and less spattering. In this paper, we present the improvements of blue laser. The first one is high power 2-kW with 300-μm core diameter and the second one is high brightness 1-kW with 200-μm. These are achieved by high power laser diode module, which has 500-W output power with 110-μm core diameter, and fiber-bundled beam combiner. Copper welding characteristics using this improved blue laser and NIR fiber laser would also be discussed.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Taisuke Atsumi, Kohei Kawasaki, Sumika Sano, Hiroatsu Aoki, Hajime Mori, Nobuyasu Matsumoto, Hiroto Kageyama, Ryoya Matsumoto, Toshiaki Sakai, Yasumasa Kawakita, and Naoki Tsukiji "High-power blue laser and copper welding with near-infrared fiber laser", Proc. SPIE 12867, High-Power Diode Laser Technology XXII, 128670A (12 March 2024); https://doi.org/10.1117/12.3002248

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