Direct laser diode welding system with anti-reflection unit

Doukei Nagayasu; Jing-bo Wang

doi:10.1117/12.540488

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18 November 2003 Direct laser diode welding system with anti-reflection unit

Doukei Nagayasu, Jing-bo Wang

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Proceedings Volume 5063, Fourth International Symposium on Laser Precision Microfabrication; (2003) https://doi.org/10.1117/12.540488
Event: Fourth International Symposium on Laser Precision Microfabrication, 2003, Munich, Germany

Abstract

A high power laser diode system for welding is widely known. However, the reliability and the reasonability are required by an industrial market. Reliability, especially lifetime, mainly depends on the temperature of laser diode (LD) and it might be rise if LD would receive reflection from welding point. This paper conducted the measurement of the reflection during welding by applying 1/4 wavelength plate and PBS. Results indicated the reflection during welding was inevitable. We developed a prototype high power laser diode system, which equipped an anti-reflection unit, to improve the reliability. The system traveled 3m/min and its bead width was 1.2 mm for 1.5 mm Al (A5052) under the spot size 2.7 x 0.6 mm FWHM. Additionally, we started to develop fast and slow collimation lenses for LD to realize a reasonale price for system The brief evaluation of fast collimation lenses was also reported.

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Doukei Nagayasu and Jing-bo Wang "Direct laser diode welding system with anti-reflection unit", Proc. SPIE 5063, Fourth International Symposium on Laser Precision Microfabrication, (18 November 2003); https://doi.org/10.1117/12.540488

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