Shifting semiconductor laser wavelengths poses callenges

(...) Another approach to generating the high-quality, high-power beam needed for efficient harmonic generation is combining a single-mode ridge waveguide DBR diode laser with a tapered amplifier stage. Götz Erbert's group at the Ferdinand Braun Institute for High-Frequency Technology (Berlin, Germany) is in the midst of a five-year project to develop compact second harmonic sources with output to a few watts in the visible for a range of applications, from cinema-scale projectors to precision spectroscopy. (...)
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Quelle: Laser Focus World Juli 2010