Abstract
Cr 2+ -doped chalcogenide crystals have shown to be efficient and broad band tunable solid state lasers for the infrared spectral range between 2μm and 3μm. Pulsed, continuous wave, mode-locked and diode pumped laser operation have been demonstrated in the recent years. Possible application of these mid-infrared lasers include scientific research, remote sensing, trace gas analysis, medicine, biology, materials processing, and ultrashort pulse generation. An overview about the research in the field of lasers based on the tetrahedrally coordinated Cr 2+ as active ion will be given. Recent results on the laser characteristics in different host materials will be presented.
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