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

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2017

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Rauch, Simon
Nagel, Simon
Zimer, Hagen

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https://doi.org/10.1364/OE.25.017657
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Optics Express. 2017, 25(15), pp. 17657-17670. eISSN 1094-4087. Available under: doi: 10.1364/OE.25.017657

Zusammenfassung

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 −1st 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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ISO 690HAAS, 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. 2017, 25(15), pp. 17657-17670. eISSN 1094-4087. Available under: doi: 10.1364/OE.25.017657
BibTex
@article{Haas2017-07-24Thinf-40339,
  year={2017},
  doi={10.1364/OE.25.017657},
  title={Thin-film filter wavelength-stabilized, grating combined, high-brightness kW-class direct diode laser},
  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}
}
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