Abstract
Oriented single crystals of the laser host material LiYF 4, doped with either Er 3+ or Nd 3+, have been grown by seeded vertical gradient freezing (VGF). Successful seeding, requiring a rather high amount of excess LiF in the melt, allowed for the production of crystals of high optical quality. In the case of neodymium doping, the dopant distribution could be related to different convective flow patterns present at different stages of growth.
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