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Sesquioxides as Host Materialsfor Rare-Earth-Doped Bulk Lasersand Active Waveguides

Chapter
Part of the Topics in Applied Physics book series (TAP, volume 106)

Abstract

This Chapter focuses on the optical applications of rare-earth oxides. Due to their thermo-mechanical properties, the sesquioxides of yttrium, lutetium, and scandium are promising host materials for rare-earth-doped solid-state lasers. An Yb-doped Sc2O3 crystal has been successfully operated in the thin disk laser setup. A maximum output power of 124.5 W with a slope efficiency of nearly 50 % in the cw mode has been achieved. Additionally, high-quality thin films of these sesquioxides grown by pulsed laser deposition as well as by electron beam evaporation, either on sapphire or on quartz substrates, have been investigated for their use in integrated optics. These films were highly textured along the <111> direction. In the case of lattice matched systems, e.g., Lu0.92Sc1.08O3 on α-Al2O3, epitaxial film growth was achieved. Waveguiding of light at different wavelengths was demonstrated in yttria films with a thickness of 1 μm on both types of substrates.

Keywords

71.55.-i; 72.80.Sk; 73.20.At; 75.47.Lx; 77.55.+f 

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Authors and Affiliations

  1. 1.Institute of Laser PhysicsUniversity of HamburgHamburgGermany

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