Shimadzu Review Vol.78[1・2](2021)
Industrial Machinery

SPECIALLY COLLECTED PAPERS

Development of High-Brightness and High-Power Blue Direct Diode Laser
and its Application for Metal Processing

by Naoki Wakabayashi1Masaya Suwa1Minoru Yamada1Naoya Ishigaki1Tomoyuki Hiroki1Shingo Uno1Katsuhiko Tokuda1Koji Tojo1

Shimadzu Review 78[1・2] (2021)

Abstract

In recent years, blue direct diode lasers (BDDL) have been attracting attention as a light source for metal processing applications. This article describes increasing the brightness and power output of such BDDLs using unique combining technology. That enabled 200 W and 500 W blue laser output from fibers with a core diameter of 100 μm and 200 μm, respectively. Bundling the fibers with a combiner has enabled metal processing with blue laser at output levels up to 1.5 kW. Consequently, such light sources can be used to lap weld or directly bond copper materials, which is especially useful for laser welding copper electrodes in automotive lithium-ion batteries or copper wires for motors.

1Advanced Analysis Unit, Technology Research Laboratory , Shimadzu Corporation, Kyoto, Japan

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