Hybrid laser system with blue laser and near-infrared fiber laser for copper welding

Masaya Nakazumi; Atsushi Oguri; Yuta Ishige; Ryotaro Konishi; Tsuyoshi Hirao; Takagi Takeshi; Nobuyasu Matsumoto; Naoki Hayamizu; Hajime Mori; Masamitsu Kaneko; Naoki Tsukiji

doi:10.1117/12.2607449

4 March 2022 Hybrid laser system with blue laser and near-infrared fiber laser for copper welding

Masaya Nakazumi, Atsushi Oguri, Yuta Ishige, Ryotaro Konishi, Tsuyoshi Hirao, Takagi Takeshi, Nobuyasu Matsumoto, Naoki Hayamizu, Hajime Mori, Masamitsu Kaneko, Naoki Tsukiji

Author Affiliations +

Proceedings Volume 11983, High-Power Diode Laser Technology XX; 119830J (2022) https://doi.org/10.1117/12.2607449
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Copper is widely used in many industries due to its high electrical conductivity, and copper welding is significant technology. High power near-infrared fiber lasers have been used in laser material processing in many fields since they provide high electric-optic conversion efficiency and excellent laser beam quality. However, copper welding with nearinfrared fiber lasers is challenging. Absorption of copper is low for near-infrared radiation, and copper diffuses heat rapidly at welding spots due to its high thermal conductivity. Previously we reported a hybrid laser system with a 150-W blue laser and a 1-kW near-infrared fiber laser for copper welding. Blue laser irradiation generates stable molten pool at welding spots due to high absorption of copper at the wavelength, and it assists near-infrared fiber laser to generate stable and spatter-less welding during the process. In this paper, we present a hybrid laser system with a 1-kW blue laser and a 3-kW near-infrared laser. The blue laser consists of blue laser diode modules with 250-W optical output power from optical fiber with 110-m core diameter. The laser diode modules contain blue laser diode chips in side lead packages, and the optical output power from the package is 13.2 W at 8.5-A rated current. We have also demonstrated laser processing to pure copper with the hybrid laser system. Uniform beads and approximately 2 mm penetration depth has been generated.

Conference Presentation

Citation Download Citation

Masaya Nakazumi, Atsushi Oguri, Yuta Ishige, Ryotaro Konishi, Tsuyoshi Hirao, Takagi Takeshi, Nobuyasu Matsumoto, Naoki Hayamizu, Hajime Mori, Masamitsu Kaneko, and Naoki Tsukiji "Hybrid laser system with blue laser and near-infrared fiber laser for copper welding", Proc. SPIE 11983, High-Power Diode Laser Technology XX, 119830J (4 March 2022); https://doi.org/10.1117/12.2607449

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