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DBR-tapered lasers at 783 nm with narrowband emission and output powers up to 7 W

B. Sumpf, L.S. Theurer, M. Maiwald, A. Müller, A. Maaßdorf, J. Fricke, P. Ressel, G. Tränkle

Published in:

Conf. on Lasers and Electro-Optics/Europe and European Quantum Electronics Conf. (CLEO/Europe-EQEC 2021), Munich, Germany, Jun. 21-25, virtual event, ISBN: 978-1-6654-1876-8, cb-2-6 (2021).

Abstract:

Wavelength stabilized, high-power diode lasers in the spectral range around 783 nm are requested as e.g. pump lasers for Tm:YAG lasers and as excitation light sources for Raman spectroscopy. In the latter case, the emission width should be narrowband enough to resolve Raman lines of e.g., solid and liquids, i.e., smaller than 0.6 nm (10 cm-1). Regardless of this, fibre-coupled light sources are preferred for the above-mentioned applications. Here, multimode fibres are often used with core diameters in the range of 50 – 500 µm for guiding the laser light. This requires a sufficiently good beam quality for an efficient coupling.

Ferdinand-Braun-Institut gGmbH, Leibniz Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany

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