30 January 2012 A 15-kW fiber-coupled diode laser for pumping applications
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New solid-state laser architectures require higher pump powers. In this paper we report the development of a new fibercoupled diode laser capable of generating 15 kW from a 2 mm diameter fiber with a 0.22 NA, representing a brightness of 220 mm.mrad at a single wavelength. In this design a special beam transformation technique has been developed to achieve these specifications at a single wavelength without the wavelength combination technique employed in high power diode lasers used in material processing applications. The specific laser presented here is at 938 nm with a spectral bandwidth of 3.1 nm FWHM, but the same architecture is possible for wavelengths between 910 and 1060 nm.
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David G. Matthews, David G. Matthews, Klaus Kleine, Klaus Kleine, Volker Krause, Volker Krause, Arnd Koesters, Arnd Koesters, Daniel Duennwald, Daniel Duennwald, Silke Pflueger, Silke Pflueger, } "A 15-kW fiber-coupled diode laser for pumping applications", Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 824103 (30 January 2012); doi: 10.1117/12.906464; https://doi.org/10.1117/12.906464

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