Abstract
We report the successful growth of undoped and neodymium dopedCaTa2O6 single crystal fibres by the laser heated pedestal growth (LHPG) technique,as well as the fibres’ structural and spectroscopic characterizations. The700 µm diameter and 3 cm length fibres present high optical quality and excellent transparency, andx-ray diffraction measurements indicate that they crystallize in the cubic structure(Pm3). The extensive transmission window of the host crystal fibres enables the study of rare-earthion emission in the near-infrared region with several technological applications. Neodymiumdoped fibres (0.5–2.5 mol%) were characterized by ground and excited state absorptions,luminescence and lifetime measurements. Stimulated emissions were measured at1.06 µm ( transition) and around 1.34 µm (). Because CaTa2O6:Nd3+ fibres can be grown with excellent optical quality at low cost and in processes that aremuch faster than those usually used to grow bulk crystals, they might become aninteresting material for the construction of compact optical devices such as diode pumpedminiature lasers.
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