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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.

Photonics Spectra
Oct 1999
diode lasersfiber lasersfiber opticsResearch & TechnologyTech Pulselasers

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