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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...
We have successfully made terrace-microspheres for laser emission: micrometer-size spherical cavity laser having terrace-shaped pumping-light entrance. Organic–inorganic hybrid materials in the binary system of 3-methacryloxypropyltrimethoxysilane (MOPS) and tetramethoxysilane (TMOS) were used for preparing the terrace on glass microspheres by sol–gel technique. To make terrace portion, a picoliter...
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