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Advances in OptoElectronics
Volume 2007 (2007), Article ID 39892, 8 pages
http://dx.doi.org/10.1155/2007/39892
Research Article

Fluorescence and Nonradiative Properties of Nd3+ in Novel Heavy Metal Contained Fluorophosphate Glass

1Department of Chemical Engineering and Materials Science, University of California, Irivne 92697, CA, USA
2AFO Research Inc., P.O. Box 1934, Glendale 91209, CA, USA
3Department of Chemistry, University of California, Irvine 92697, CA, USA

Received 15 November 2006; Accepted 18 February 2007

Academic Editor: Jongha Moon

Copyright © 2007 Ju H. Choi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We demonstrate new series of heavy metal containing fluorophosphate glass system. The fluorescence and nonradiative properties of Nd3+ ions are investigated as a function of Nd2O3 concentration. The variation of intensity parameters Ω2, Ω4, and Ω6 is determined from absorption spectra. The spontaneous probability (A) and branching ratio (β) are determined using intensity parameters. The emission cross sections for the 4F3/24I13/2 transition, which is calculated by Fuchtbabauer-Ladenburg method, decrease from 6.1×1021 to 3.0×1021(pm2) and those for the 4F3/24I11/2 transition decrease from 3.51×1020 to 1.7×1020 as Nd2O3 concentration increase up to 3 wt%. The nonradiative relaxation is analyzed in terms of multiphonon relaxation and concentration quenching due to energy transfer among Nd3+ ions. Finally, the above results obtained at 1 wt %Nd2O3 are compared with some of reported laser host glasses which indicated the potentials for broadband-amplifiers and high-power laser applications.