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Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser

Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser

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HAAS, Matthias, Simon RAUCH, Simon NAGEL, Lukas IRMLER, Thomas DEKORSY, Hagen ZIMER, 2017. Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser. In: Optics Express. 25(15), pp. 17657-17670. eISSN 1094-4087. Available under: doi: 10.1364/OE.25.017657

@article{Haas2017-07-24Thinf-40339, title={Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser}, year={2017}, doi={10.1364/OE.25.017657}, number={15}, volume={25}, journal={Optics Express}, pages={17657--17670}, author={Haas, Matthias and Rauch, Simon and Nagel, Simon and Irmler, Lukas and Dekorsy, Thomas and Zimer, Hagen} }

Rauch, Simon 2017-10-13T13:10:06Z Dekorsy, Thomas Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser 2017-10-13T13:10:06Z eng Haas, Matthias Haas, Matthias Dekorsy, Thomas Nagel, Simon Zimer, Hagen Irmler, Lukas Nagel, Simon Zimer, Hagen 2017-07-24 Irmler, Lukas Rauch, Simon We report on kW-class dense wavelength beam combining of a laser diode module consisting of ten broad-area laser diode bars by using a novel multi-laser cavity approach based on a thin-film filter (TFF) as a dispersive optical element. The wavelength-stabilized output of the TFF cavity is beam combined upon a −1<sup>st</sup> order transmission grating. Hereby, a cylindrical telescope is used for linear dispersion-matching between the TFF and the combiner grating. On the basis of simulations of the resulting beam quality deterioration, we are able to optimize the cavity and the combiner setup for optimal beam quality preservation. We demonstrate a highly efficient direct diode laser with 1.1-kW output power and a symmetrical beam parameter product of about 6mm × mrad (95 % power content) in both beam axis.

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