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Optical Engineering

Frequency upconversion luminescence in Yb3+-sensitized Er3+- and Pr3+-codoped PbGeO3:PbF2:xF2 (x = Mg, Ba) glass
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Paper Abstract

The optical properties and energy-transfer upconversion luminescence of Er3+- and Pr3+/Yb3+-codoped PbGeO3-PbF2-xF2 (x=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 2H11/24I15/2, 4S3/24I15/2 e 4F9/24I15/2, respectively, was readily observed. In the Pr3+/Yb3+-codoped system, emission peaks around 485, 530, 610, and 645, which were ascribed to the 3P03HJ (J=4,5,6) and 3P03FJ(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 2F7/2, energy-transfer Yb3+(2F5/2)−Pr3+(3H4), and excited-state absorption of Pr3+ ions provoking the 1G43P0 transition. The dependence of the upconversion emission on glass composition, pump power, and doping contents was also examined. Glassy and glass-ceramic samples were compared in order to determine the system with better luminescence efficiency.

Paper Details

Date Published: 6 January 2016
PDF: 4 pages
Opt. Eng. 55(1) 017101 doi: 10.1117/1.OE.55.1.017101
Published in: Optical Engineering Volume 55, Issue 1
Show Author Affiliations
Alexandre O. Silva, Univ. Federal Rural de Pernambuco (Brazil)
Artur Gouveia-Neto, Univ. Federal de Alagoas (Brazil)
Luciano A. Bueno, Univ. de Sorocaba (Brazil)

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