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High radiance red-emitting light sources are required for several laser applications such as flying-spot-displays or high resolution microscopy. As many of such applications are moving out of the lab into industrial environment there is a high demand for small sized, efficient and reliable laser sources, for which semiconductor lasers are preferred. The red-emitting tapered diode lasers presented here, emit up to 1 W of optical power with a nearly diffraction limited beam at 635 nm. A preliminary lifetime test yielded more than 2000 h at a power level of 500 mW.
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K. Paschke, G. Blume, H. Wenzel, J. Pohl, M. Matalla, D. Feise, P. Ressel, A. Sahm, J. Glaab, B. Sumpf, "635 nm tapered diode lasers with more than 2000 h operation at 500 mW output power," Proc. SPIE 12024, Advances in Display Technologies XII, 120240A (3 March 2022); https://doi.org/10.1117/12.2607548