Abstract
Neodymium-doped polycrystalline yttrium aluminum garnet (Nd:YAG) ceramics require nanometer-scale surface roughness when used as laser gain media to minimize light scattering. Variations in grain size and crystallographic orientation can result in uneven material removal between grains and excessive material removal at the grain boundaries, hindering the smoothing of this material. The introduction of rare earth ion dopants, necessary for laser oscillation, can influence these parameters. This paper explores the effects of varying dopant concentration on grain structure and those effects on the polishing characteristics of polycrystalline Nd:YAG ceramics.
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