Beam shaping and fiber coupling of high-power diode laser arrays

Bodo Ehlers; Keming Du; Markus Baumann; Hans-Georg Treusch; Peter Loosen; Reinhart Poprawe

doi:10.1117/12.281128

18 August 1997 Beam shaping and fiber coupling of high-power diode laser arrays

Bodo Ehlers, Keming Du, Markus Baumann, Hans-Georg Treusch, Peter Loosen, Reinhart Poprawe

Proceedings Volume 3097, Lasers in Material Processing; (1997) https://doi.org/10.1117/12.281128
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

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.

Citation Download Citation

Bodo Ehlers, Keming Du, Markus Baumann, Hans-Georg Treusch, Peter Loosen, and Reinhart Poprawe "Beam shaping and fiber coupling of high-power diode laser arrays", Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); https://doi.org/10.1117/12.281128

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