Abstract

High-concentration Er:YAG single-crystal fibers have been grown using the laser-heated pedestal growth technique. Instability in the melt and concomitant opacity of fibers were observed at source concentrations higher than $15\mathrm{mol}\mathrm{.}\%$. Spectroscopic examination shows that broadening of the linewidth of the ${}^4{I}_{13/2}\to {}^4{I}_{15/2}$ transition is strongly dependent on ${\mathrm{Er}}^{3+}$ concentration.

© 2011 Optical Society of America

Optimizing alignment and growth of low-loss YAG single crystal fibers using laser heated pedestal growth technique

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