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Shimadzu Review 74[3・4] (2017.12)
A 450 nm-wavelength, high-brightness fiber-coupled blue direct diode laser (BDDL) has been developed for laser processing (product name: BLUE IMPACT). Using the combination of spatial and polarization multiplex systems, a laser output power of more than 100 W has been achieved from a 100 μm-core optical fiber, the highest brightness in the world for BDDL. In addition, copper sheeting, which, due to its low absorbance is difficult to process with a conventional infrared laser beam, could be successfully welded by the BDDL, which has high absorbance in copper. Therefore, BDDL is expected to be the most suitable next-generation short-wavelength high-brightness source for laser processing of difficult materials.
Keywords: High-brightness laser, Blue laser diode, Direct diode laser (DDL), Laser processing, Copper
1Device Department, Shimadzu Corporation, Kanagawa, Japan
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