Abstract
In this work, Judd-Ofelt analysis is applied to Er nanoparticles doped cadmium-phosphate glasses in order to evaluate their potential in glass laser systems. The phenomenological Judd-Ofelt parameters Omega((2)), Omega((4)) and Omega((6)) are determined for one glass system and the quality factor is compared with equivalent parameters for several other glass hosts. The spontaneous emission probabilities, lifetimes, branching ratios of Er3+ transitions from the excited - state J manifolds to the lower - lying J' manifolds are determined. The glass fluorescence emission (611, 628, 638, 662.5, 716.4 nm) lines are observed. The above lines are assigned to (4)G(11/2) -> I-4(11/2), F-4(3/2 ->) I-4(13/2), F-4(5/2) -> I-4(13/2), F-4(9/2) -> I-4(15/2), and F-4(7/2) -> I-4(13/2) transitions respectively.Their emission cross sections are calculated. The transition E-4(9/2) -> I-4(15/2) in the red spectral region has large radiative time, branching ratio, and stimulated emission cross section which indicates the suitability of glass system to be used in laser and electroluminescence applications. (C) 2012 Elsevier B.V. All rights reserved.