Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 21, Issue 1, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2014.2346618
Keywords
Solid-state lasers; rare-earth doped lasers; high-power lasers; thin-disk lasers; infrared lasers; diode-pumped lasers; mid-infrared lasers; Ytterbium-lasers; Erbium-lasers; Holmium-lasers; Thulium-lasers
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Sesquioxides combine excellent thermomechanical properties, comparably low phonon energies and a strong crystal field, making them ideally suited for broad band emitting high power laser materials in the infrared and mid-infrared spectral range. In this paper, the latest progress on diode pumped highly efficient high-power solid-state lasers based on rare-earth doped sesquioxides, Lu2O3, Sc2O3, and Y2O3, as well as different mixed sesquioxides (LuaScbYc)(2)O-3 with a + b + c = 1 is reviewed. While Yb3+-doped sesquioxides allow for record high efficiencies at several 100 W of output power in continuous wave operation and record high average powers in pulsed mode in the 1-mu m spectral range, Tm3+- and Ho3+-doped sesquioxides enable efficient broad band laser operation and ultrashort pulse duration around 2 mu m. Finally, Er3+-doped sesquioxides enabled the highest efficiencies and output powers demonstrated so far at room temperature in the mid-infrared range at 3 mu m.
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