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Proceedings Paper

Beam shaping and fiber coupling of high-power diode laser arrays
Author(s): Bodo Ehlers; Keming Du; Markus Baumann; Hans-Georg Treusch; Peter Loosen; Reinhart Poprawe
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Paper Abstract

A technique for coupling the radiation of a high-power diode laser bar into one multimode fiber with high efficiency, easy alignment requirements and low manufacturing costs is demonstrated using a single fiber with 400 micrometers core diameter. The principal item of the fiber-coupling system is a pair of micro step-mirrors--a novel design for beam shaping. The overall efficiency from diode-laser to fiber is 71% with 20 W cw laser power through the fiber. Polarization and wavelength multiplexing renders the system scaleable to higher output power which makes it highly suitable for material processing and pumping of lasers.

Paper Details

Date Published: 18 August 1997
PDF: 6 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281128
Show Author Affiliations
Bodo Ehlers, Fraunhofer-Institut fuer Lasertechnik (Germany)
Keming Du, Fraunhofer-Institut fuer Lasertechnik (Germany)
Markus Baumann, Fraunhofer-Institut fuer Lasertechnik (Germany)
Hans-Georg Treusch, Fraunhofer-Institut fuer Lasertechnik (Germany)
Peter Loosen, Fraunhofer-Institut fuer Lasertechnik (Germany)
Reinhart Poprawe, Fraunhofer-Institut fuer Lasertechnik (Germany)


Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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