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Design and assembly of a miniaturized high-power laser bar to 50 µm fiber coupling module

: Beckert, E.; Schreiber, P.; Burkhardt, T.; Werner, E.; Hülsewede, R.


Zediker, M.S. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
High-power diode laser technology and applications VI : 21 - 23 January 2008, San Jose, California, USA
Bellingham, WA: SPIE, 2008 (SPIE Proceedings Series 6876)
ISBN: 978-0-8194-7051-5
ISSN: 0277-786X
Paper 687613
Conference "High-Power Diode Laser Technology and Applications" <6, 2008, San Jose/Calif.>
Conference Paper
Fraunhofer IOF ()

Miniaturized optical systems that couple light from broad area or trapezoid diode laser bars with cw powers up to 100 W into fibers with core diameters between 50 µm and 100 µm have been developed and assembled on smart Direct-Copper-Bond (DCB) system platforms that incorporate active cooling structures as well as hermetic housing facilities. The approach for a fast and flexible joining of the optical elements by a flux-free applied solder is to jet liquid solder spheres onto joining geometries, thus enabling for creating complex shaped solder joint geometries with high accuracies.