Abstract
High-power mid-IR lasers at 3 μm wavelength have many potential applications in medical and industrial fields because of the strong absorption by water at that wavelength region. Recently, erbium-doped cubic rare-earth sesquioxide crystals (e.g. Lu2O3, Y2O3, and Sc2O3) are gaining attention as laser sources due to their lower phonon energies and higher thermal conductivities compared with YAG. In particular, Er:Lu2O3 is known as suitable source because the thermal conductivity stays high even at a high doping level [1]. The high quality polycrystalline transparent ceramics of Lu2O3 which became available in recent years will open up the possibility of high-power mid-IR lasers because of the advantages such as mechanical strength and manufacturability of large volume.
© 2017 IEEE
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