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.
Beam shaping and fiber coupling of high-power diode laser arrays
Lasers in Material Processing ; 1997 ; Munich,Germany
Proc. SPIE ; 3097
1997-08-18
Conference paper
Electronic Resource
English
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