Erbium Distribution in Single Crystal YAG Fibers Grown by Laser-Heated Pedestal Growth Technique
Rutgers, The State University of New Jersey New Brunswick United States
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Single crystal SC yttrium aluminum garnet YAG, Y3Al5O12 as a host material has the ability to be doped with high concentrations of Er3 ions. We utilize this ability to grow a 50 Er3 doped YAG SC fiber, which was inserted into a SC YAG tube. This rod-in-tube was used as a preform in our laser-heated pedestal growth LHPG apparatus to grow a fiber with a radial distribution of Er3 ions. The work shows that there is a distribution of Er3 ions from their fluorescence and two different techniques were used to measure the index of refraction.