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16 March 2016 Optical properties and upconversion emission in Yb3+-sensitized Er3+- and Pr3+-codoped PbGeO3:PbF2:xF2 (x = Mg, Ba) glass
Alexandre O. Silva, A. S. Gouveia-Neto, Luciano A. Bueno, Carlos E. N. Oliveira
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Proceedings Volume 9726, Solid State Lasers XXV: Technology and Devices; 97261L (2016) https://doi.org/10.1117/12.2207235
Event: SPIE LASE, 2016, San Francisco, California, United States
Abstract
In this report the optical properties and energy-transfer upconversion luminescence of Er3+- and Pr3+/Yb3+-codoped PbGeO3-PbF2-xF2(Mg, Ba) glass and glass-ceramic under infrared excitation at 975 nm is investigated. In Er3+/Yb3+- codoped samples, green(525, and 550 nm), and red(662 nm) luminescence corresponding to the 2H11/2→4I15/2, 4S3/2→4I15/2 e 4F9/2→4I15/2, respectively, was readily observed. In the Pr3+/Yb3+ co-doped system, emission peaks around 485, 530, 610, and 645 which were ascribed to the 3P0 - 3HJ (J=4,5,6), and 3P0 – 3FJ (J=2,3,4), transitions, respectively, were observed. The population of the praseodymium 3P0 emitting level was accomplished through a combination of ground-state absorption of Yb3+ ions at the 2F7/2, energy-transfer Yb3+(2F5/2) – Pr3+(3H4), and excited-state absorption of Pr3+ ions provoking the 1G4 – 3P0 transition. The dependence of the upconversion emission on glass composition, pump power, and doping contents was also examined. Glassy and glass-ceramic samples was compared in order determine the system with better luminescence efficiency.
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Alexandre O. Silva, A. S. Gouveia-Neto, Luciano A. Bueno, and Carlos E. N. Oliveira "Optical properties and upconversion emission in Yb3+-sensitized Er3+- and Pr3+-codoped PbGeO3:PbF2:xF2 (x = Mg, Ba) glass", Proc. SPIE 9726, Solid State Lasers XXV: Technology and Devices, 97261L (16 March 2016); https://doi.org/10.1117/12.2207235
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KEYWORDS
Upconversion
Glasses
Ions
Luminescence
Absorption
Praseodymium
Infrared radiation
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