Abstract
Trivalent dysprosium (Dy3+)-doped K–Sr–Al phosphate glasses have been prepared and investigated for their optical and luminescence properties. Judd–Ofelt theory has been used to derive radiative properties for the 4F9/2 level of Dy3+ ions. The luminescence spectrum of 1.0 mol% Dy2O3-doped glass shows intense yellow emission around 572 nm ascribed to 4F9/2 → 6H13/2 transition with 78 % branching ratio and emission cross section of the order of 2.48 × 10−21 cm2. Moreover, the quantum efficiency of the 4F9/2 level has been found to be 76 %. The luminescence decay curves for the yellow emission (4F9/2 → 6H13/2) have been measured and analyzed as a function of Dy3+ ion concentration. The results revealed that Dy3+-doped phosphate glasses could be useful for yellow laser applications.
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Acknowledgments
Dr. V. Venkatramu is grateful to Council of Scientific and Industrial Research (CSIR), New Delhi, for the sanction of major research project (No. 03(1229)/12/EMR-II, dated 16 April, 2012). This work has also been supported by Mega Project (No. 2009/34/36/BRNS/3174, dated 12 February, 2010) sanctioned to Prof. C.K. Jayasankar through MoU between Sri Venkateswara University, Tirupati, and Bhabha Atomic Research Centre, Mumbai.
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Linganna, K., Haritha, P., Venkata Krishnaiah, K. et al. Optical and luminescence properties of Dy3+ ions in K–Sr–Al phosphate glasses for yellow laser applications. Appl. Phys. B 117, 75–84 (2014). https://doi.org/10.1007/s00340-014-5801-6
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DOI: https://doi.org/10.1007/s00340-014-5801-6