Judd–Ofelt analysis and transition probabilities of Er3+ doped KY1−x−yGdxLuy(WO4)2 crystals

Abstract In this work the transition probabilities, radiative lifetimes and branching ratios of Er 3+ ions in KY 1− x − y Gd x Lu y (WO 4 ) 2 crystals have been determined. With this aim, Er 3+ doped KY 1− x − y Gd x Lu y (WO 4 ) 2 crystals have been grown by means of the high temperature Top-Seeded Solution Growth. A spectroscopic analysis of Er 3+ ions in this crystal has been performed following anisotropic Judd–Ofelt analysis to obtain basic spectroscopic properties. A quantum efficiency over 97% has been determined for the 4 I 13/2 → 4 I 15/2 transition, indicating that this material is adequate for the development of lasers and amplifiers working in the third telecommunication window.

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