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Proceedings Paper

Ultrashort pulse laser welding of glasses without optical contacting
Author(s): Sören Richter; Felix Zimmermann; Dirk Sutter; Aleksander Budnicki; Andreas Tünnermann; Stefan Nolte
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Paper Abstract

We report on ultrashort pulse induced welding of fused silica without previously optical contacting of the samples. We used a TruMicro 2020 by TRUMPF delivering bursts of intense ultrashort laser pulses with an individual pulse energy of up to 10 μJ, an intraburst pulse separation of 20 ns and a burst repetition rate of 200 kHz. With this setup we could realize a large pool of molten material with a length of up to 450 μm and a diameter of around 160 μm. If the laser focus is placed near the surface of a glass sample the low viscosity of the hot material induces bulging of the surface and ejection of the molten material. This molten material can be used to fill a gap of up to 3 μm between fused silica samples.

We also determined the breaking strength with a three-point bending test. The determined maximal value of 73 MPa is equivalent to 85% of the stability of the pristine bulk material.

Paper Details

Date Published: 17 February 2017
PDF: 8 pages
Proc. SPIE 10094, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII, 1009411 (17 February 2017); doi: 10.1117/12.2250389
Show Author Affiliations
Sören Richter, TRUMPF Lasertechnik GmbH (Germany)
Friedrich-Schiller-Univ. Jena (Germany)
Felix Zimmermann, Friedrich-Schiller-Univ. Jena (Germany)
Dirk Sutter, TRUMPF Laser GmbH (Germany)
Aleksander Budnicki, TRUMPF Laser GmbH (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Stefan Nolte, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


Published in SPIE Proceedings Vol. 10094:
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVII
Alexander Heisterkamp; Peter R. Herman; Michel Meunier; Roberto Osellame, Editor(s)

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