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German Researchers Employ Fiber Laser to Weld a Fine Seam

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Scientists from the Laserzentrum Fachhochschule Münster in Steinfurt, Germany, and the Technische Universitat Chemnitz reported that they seam welded stainless steel foil with a joint smaller than 70 µm. They employed a fiber laser that was produced in cooperation with SDL Inc. of San Jose, Calif., and AMS Optotech GmbH of Munich, Germany.

The device, which emits 9 W of continuous-wave power, comprises 25 m of Yb-doped quartz fiber and a diode laser pump. For this study, a 50-mm focusing lens collimated the TEM00 beam to a 30-µm spot.

The group predicted that advances in focusing optics will allow seam widths of less than 10 µm. It expects applications to be found in micromachining.
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Published: October 1999
diode lasersfiber lasersfiber opticsResearch & TechnologyTech PulseLasers

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